About our online store
“Bersidn: 16-Year Footwear Factory · Global Custom Wholesale Specialist”
Welcome to Bersidn. Bersidn is a professional footwear manufacturing and export factory based in Wenzhou, China—the global capital of footwear industry—with 16 years of dedicated experience in R&D, large-scale production, personalized customization and global cross-border export. Our core product lines cover men's and women's casual shoes, breathable sneakers, fashion sandals, professional waterproof rain boots, and heavy-duty outdoor functional shoes. We provide one-stop OEM/ODM customization services for global clients, and our products have been exported to more than 30 countries and regions across 5 continents. We also operate an official store on Alibaba International Station as an additional purchasing channel for our customers.
Over the past 16 years, we have always adhered to the business philosophy of "quality first, customization as core, customer foremost, integrity-based". Unlike many factories that pursue low prices at the expense of quality, we insist on using premium raw materials, adopting advanced production technology and implementing strict full-process quality control. We believe that a good pair of shoes is not just a daily necessity, but a reliable companion for people's work and life. Especially for rain boots, which are the most essential protective gear in rainy days, we have invested the most energy and resources to perfect every detail, making sure that every pair of Bersidn rain boots can keep feet dry, comfortable and safe no matter how heavy the rain is or how rough the road is.
Our Story
Our Story: 16 Years of Crafting Rain Boots That Last
The Beginning: A Small Workshop in Wenzhou (2008)
Our story started in 2008, in a 200-square-meter small workshop in Wenzhou, with only 3 skilled workers, 2 old rubber mixing machines and a simple hand-gluing production line. Back then, we were just a group of young people who loved shoemaking, and we thought making rain boots was easy—just mix rubber, cut it, glue it to the sole, and you're done. We had no idea how wrong we were.
Our first order was 1200 pairs of basic rain boots for a South American customer. We worked day and night for 2 weeks, and we were proud of the finished products. But 1 month later, we received a devastating call: all 1200 pairs were leaking at the seams, the rubber was cracking after only 2 weeks of use, and the customer was returning the entire order. We lost over $30,000 that day—almost all of our startup capital.
That failure hit us hard, but it also taught us the most important lesson we have ever learned: rain boots are not just rubber and glue. They are a product of science, precision and craftsmanship. A 1-degree difference in mixing temperature, a 1-minute difference in vulcanization time, or a 0.1mm gap in the glue can make the difference between a boot that lasts 3 years and one that leaks after one rain.
The Turning Point: 18 Months of Non-Stop Testing
After that disaster, we didn't give up. Instead, we spent every waking hour learning everything we could about rubber chemistry and rain boot manufacturing. We visited every experienced rain boot master in Wenzhou, bought every industry textbook we could find, and set up a small test lab in our workshop.
For 18 months, we tested over 200 different rubber formulas, adjusted mixing temperatures from 120℃ to 180℃, and tried every possible vulcanization time. We made thousands of test boots, cut them open, bent them 10,000 times, soaked them in water for 72 hours, and left them in the sun for weeks to test aging resistance. Our hands were covered in rubber stains and burns, and we slept in the workshop more nights than we slept at home.
Finally, in late 2009, we developed our first stable rubber formula—one that was soft, elastic, waterproof and resistant to cracking. That formula is still the foundation of all our rain boots today.
The Evolution: From Handmade to Automated Excellence
In 2012, we made the biggest investment in our history: we borrowed money to buy 3 imported fully automatic one-piece injection molding machines. This was a game-changer. Unlike hand-glued boots, which always have seams that can leak, injection-molded boots are formed in one single piece—upper and sole together—with no seams at all. This completely eliminated the biggest problem in rain boot manufacturing: water leakage.
In 2015, we opened our official store on Alibaba International Station, which opened the door to more global customers. We started receiving orders from Europe, Africa, Southeast Asia and all over South America. As we grew, we never forgot the lesson from our first failure. We continued to invest in R&D, developing specialized formulas for different climates: anti-mold and anti-sticky formulas for the humid long rainy seasons in Peru and Venezuela, anti-aging and anti-UV formulas for the harsh sunlight in Africa, and cold-resistant formulas that stay soft at -20℃ for European winters.
Our Promise: 16 Years of Integrity, 16 Years of Quality
Today, 16 years later, we have 3 standardized production workshops, 8 fully automatic production lines, and over 200 skilled workers. We produce over 5 million pairs of shoes every year, and our rain boots are worn by farmers, construction workers, commuters and outdoor enthusiasts in over 30 countries.
But some things have never changed:
We still never use recycled rubber or inferior fillers, even though it would cut our costs by 30%. We only use 100% new eco-friendly natural rubber and PVC.
We still test every single pair of rain boots 3 times for waterproofing before they leave the factory. Any boot that fails is immediately scrapped.
We still treat every customer like a partner, not just a buyer. We work closely with our clients to develop products that meet their exact market needs.
For 16 years, we have only done one thing: make good rain boots. And we will keep doing it for the next 16 years, and the next 16 after that.
Our Expertise
At Bersidn,With 16 years of specialized footwear manufacturing experience, we have built a complete industrial chain from raw material processing to finished product delivery. We own 3 standardized production workshops covering 12,000 square meters, 8 fully automatic production lines imported from Germany and Taiwan, and a team of over 200 skilled workers with an average of 8 years of industry experience. Our annual production capacity exceeds 5 million pairs, allowing us to stably meet the large-volume and high-quality demands of global customers.
As our core competitive product, rain boots account for 60% of our total production. We have accumulated 16 years of professional rain boot manufacturing experience and mastered the core rubber compound formula and advanced production technology that many small factories cannot replicate. We understand the unique requirements of rain boots for different scenarios and climates, and have formed a complete set of standardized production processes and quality control systems.
Innovation & R&D
Innovation is the driving force behind our sustainable development. We have established a professional R&D center with 12 senior engineers and designers, who have an average of 10 years of experience in the footwear industry. We invest 5% of our annual revenue in R&D every year, focusing on material innovation, process optimization and product function upgrading.
Our R&D team has developed more than 20 exclusive material formulas through 16 years of continuous testing and improvement, with EVA material technology as our core advantage:
- Lightweight high-elastic EVA formula: 30% lighter than traditional rubber rain boots, with excellent shock absorption and comfort
- Anti-mold and anti-sticky EVA formula for high humidity and long rainy seasons in South America
- Anti-aging and anti-UV EVA/rubber hybrid formula for strong sunlight and high temperature in Africa
- Cold-resistant EVA formula that remains soft and elastic at -20℃ for cold winters in Europe
- Durable PVC formula for cost-effective basic rain boots
We also continue to upgrade our production technology. From the initial hand-gluing process to the current fully automatic one-piece injection molding process, we have continuously improved production efficiency and product quality. We have obtained 8 national patents related to rain boot manufacturing technology, and our products have passed EU REACH, RoHS and other international certifications.
Customization for You
We provide full-range one-stop OEM/ODM customization services to meet all personalized needs of global customers. Our customization capabilities cover every link from product design to final packaging:
- Style Customization: We have more than 50 existing styles (including 28 EVA rain boot styles, 15 rubber rain boot styles and 7 PVC rain boot styles) for you to choose from, or we can develop new styles according to your design drawings, samples or market demands. Our R&D team can complete a new style development within 15 days.
- Material Customization: You can freely choose from our material library with EVA as the first priority, followed by natural rubber and high-quality PVC, or specify the material you need.
- Size Customization: Standard EU sizes 35-47 are available, and we can also customize special sizes for wide feet, narrow feet, large feet and small feet.
- Detail Customization: Customize color (standard colors or any Pantone color), logo (embossed, printed, embroidered, heat transfer), sole pattern, lining material, insole, shoe tube height and decorative accessories.
- Function Customization: Add waterproof, non-slip, height increasing, wear-resistant, warm lining, anti-puncture, anti-static and other functions according to your needs.
- Packaging Customization: Customize brand boxes, bags, hang tags, labels, instruction manuals and other packaging materials to help you build your own brand image.
We offer flexible minimum order quantities: 10 pairs for stock products and 100 pairs per style for custom products, supporting small batch trial orders to help you test the market risk-free
Customer Experience & Privacy Protection
At bersidn, We are committed to providing every customer with a professional, convenient and worry-free purchasing experience. We support dual-channel purchasing: customers can place orders directly through our official website www.bersidn.com, or through our Alibaba International Station store for added convenience. Both platforms provide the same high-quality products and services.
Each customer will be assigned a dedicated account manager who provides one-on-one service throughout the entire process from inquiry to after-sales. Our sales team is online 24 hours a day and will reply to your messages within 24 hours, providing detailed product information, customized quotes and order solutions according to your specific needs. During the production process, we will send you real-time production photos and videos to keep you updated on the order progress.
We attach great importance to the protection of customer privacy. All orders are shipped in plain unmarked cartons without any logos, brand names or product information, so no one can tell what is inside the package from the outside. We strictly protect customer personal information, order information and design documents, and never disclose or sell any customer information to third parties
Global Reach & Quality Assurance
Our products have been exported to more than 30 countries and regions across 5 continents, covering North America, Europe, Africa, Southeast Asia, Japan, South Korea, as well as Peru, Venezuela, Brazil, Argentina, Chile, Colombia, Ecuador, Bolivia and all other South American countries. We have established long-term stable cooperative relationships with more than 500 wholesalers, retailers, brand owners and cross-border sellers around the world.
Quality is the lifeblood of our brand. We have established a strict full-process quality control system with 12 inspection links from raw material incoming inspection to finished product shipment:
- Raw material incoming inspection: All raw materials must pass strict quality inspection before entering the warehouse.
- Production process inspection: Each production link has a dedicated quality inspector to conduct random inspections.
- Semi-finished product inspection: Inspect the size, appearance and performance of semi-finished products.
- Finished product full inspection: Every pair of shoes undergoes 100% full inspection before leaving the factory.
- Packaging inspection: Inspect the packaging quality and shipping marks before shipment.
For rain boots, we have added 3 special inflation waterproof tests: first, inflate the rain boot to a certain pressure and immerse it in water for 30 seconds to check for air bubbles; second, inflate again and let it stand for 24 hours to check for pressure drop; third, perform a water filling test to ensure no leakage at all. Any unqualified product is directly scrapped and will never leave the factory.
Rain Boots Special Advantages
As our factory's flagship and most competitive product category, we have 16 years of specialized rain boot manufacturing experience and have mastered the core rubber compound formula and advanced production technology that many small factories cannot reach. Unlike ordinary rain boots that are easy to leak, crack, smell bad and wear out quickly, every pair of Bersidn rain boots is carefully crafted through 120+ production processes and 12 strict quality inspections, ensuring excellent waterproof performance, durability and comfort.
Our Exclusive Rain Boot Manufacturing Process
- Raw Material Mixing & Compounding: We prioritize 100% new high-quality EVA material as our core rain boot material, followed by natural rubber and environmentally friendly PVC, completely rejecting recycled materials, inferior fillers and harmful additives. Our senior engineers mix EVA resin, foaming agent, vulcanizing agent, accelerator, anti-aging agent, anti-mold agent and other additives according to the exact formula ratio, and control the mixing temperature within ±2℃ to ensure the uniformity and stability of the material.
- Open Milling & Preforming: The mixed material is sent to the open mill for repeated rolling to further improve the plasticity and uniformity. Then it is cut into sheets of specified thickness and preformed into the shape required for injection molding.
- Fully Automatic One-Piece Injection Molding: This is the core process that determines the waterproof performance of rain boots. We have introduced 6 sets of imported fully automatic injection molding machines, which inject the molten EVA/rubber/PVC into the precision mold at high pressure and high temperature, forming the entire rain boot (upper + sole) in one piece without any seams. This process completely eliminates the problem of water leakage at the seams that is common in glued rain boots.
- Vulcanization/Foaming Treatment: The formed rain boots are sent to the vulcanization/foaming furnace for high-temperature treatment. We strictly control the time and temperature according to different material formulas to ensure that the material achieves the best elasticity, hardness, wear resistance and aging resistance. For EVA rain boots, we use a special foaming process to make them lightweight and high-elastic.
- Trimming & Polishing: After treatment, workers manually trim the excess burrs on the edge of the rain boots, and polish the surface to make it smooth and beautiful. Every pair of rain boots is carefully trimmed by hand to ensure no sharp edges or burrs that will scratch the skin.
- 3 Times Waterproof Testing: This is the most critical quality inspection link. Every pair of rain boots must pass 3 inflation waterproof tests: first, inflate the rain boot to a certain pressure and immerse it in water for 30 seconds to check for air bubbles; second, inflate again and let it stand for 24 hours to check for pressure drop; third, perform a water filling test to ensure no leakage at all. Any rain boot that fails the test will be directly scrapped.
- Final Inspection & Packaging: After passing the waterproof test, the rain boots will undergo a final full inspection of appearance, size, logo and function. Qualified products will be packed in plain cartons (or customized packaging according to customer requirements) and sent to the finished product warehouse waiting for shipment.
Why Our Rain Boots Stand Out
- 100% Waterproof Guarantee: One-piece injection molding structure without any seams, combined with 3 times waterproof testing, ensures that every pair of rain boots is completely waterproof.
- Lightweight & Comfortable (EVA Advantage): Our flagship EVA rain boots are 30% lighter than traditional rubber rain boots, with excellent shock absorption and elasticity. They feel like wearing sneakers, and you won't feel tired even if you wear them all day.
- Super Durable: Premium EVA/rubber/PVC material and scientific production process make our rain boots resistant to wear, tear, aging and cracking. They can be used for 2-3 years even in harsh working environments.
- Eco-Friendly & Odorless: All materials are non-toxic and environmentally friendly, meeting EU REACH and RoHS standards. There is no pungent chemical odor, which is safe for human health.
- Multi-Climate Adaptation: We have special formulas for different regions: anti-mold and anti-sticky for South America, anti-aging and anti-UV for Africa, cold-resistant (-20℃) for Europe, and lightweight and breathable for Southeast Asia.
- Multiple Material Options: We provide three material options with EVA as the first priority to meet different needs and budgets:
- EVA Rain Boots: Lightweight, high-elastic, comfortable, best for daily commuting and outdoor activities
- Rubber Rain Boots: Super durable, wear-resistant, best for heavy-duty industrial and agricultural work
- PVC Rain Boots: Cost-effective, easy to clean, best for basic daily use
