Podragon airtight full waterproof waist bag, double waterproof zippers, a small front bag and a main bag with a capacity of about 1.8L. It can store mobile phones, wallets, licenses, charging treasure and other personal belongings. It can be used for swimming, bathing in hot springs, tracing rivers, beaches, surfing, fishing and even snorkeling.

According to relevant instructions:

Podragon deep sea dragon series waterproof waist bag, its shape design is consistent with ergonomics:

3D interactive streamlined design, golden size, space maximization, back width 3D molding.

The materials are high-quality brands: leather, zipper and reflector

- 1. Cordura DuPont 500D double sided TPU film

2. Air tight zipper jDS

3.3m reflective

4. Guolian donefour Duraflex fastener

5. Nylon webbing!!

Classification knowledge of waterproof waist bag and relevant information of air tight zipper:

There are many kinds of waterproof waist bags on the market.

For example, the waterproof waist bag with rainproof level is generally sewn by the internal coating of the fabric. The zipper is not waterproof. Even the zipper with coating can only prevent light rain or water splashing for a while. Most bodypacks have such a waterproof level.

Another example is the waterproof waist bag that can soak in water. The main structure of this kind of waist bag is made by voltage welding process, but it can also be subdivided. The difference is mainly in the structure of the bag mouth. Most of the bags on the market are made of beam mouth, which can soak in water 1-5 meters deep for about 30 minutes. For a long time, there is a risk of water seepage due to the looseness of the extrusion of the roll mouth of the beam mouth. It can be tested normally. When the roll mouth is filled with air and placed for 60 minutes, it is found that there is less air. This is a roll mouth full waterproof waist bag, and its waterproof level is generally ipx6-7!

Then subdivide the opening of waterproof waist bag air tight zipper that can soak in water. Now the technology is relatively mature. High quality air tight zipper can reach the level of diving. The only disadvantage is that the zipper is a little difficult to pull and needs more strength than ordinary zippers. High quality airtight zipper waterproof waist bag, its waterproof level can reach ipx8 level.

When it comes to air tight zippers, the most famous are YKK air tight zippers in Japan and tizip zippers in Germany, but the cost is too high (starting at 50-300 yuan / piece), and ordinary bags can't afford it. Therefore, there is a huge space for the development of air tight zippers in China. I remember that there is a Taiwan enterprise's air tight zipper specially used for outdoor portable ice bags, with strong air tightness, which is close to YKK level, while in China, such as Jiangsu, Zhejiang, Fujian The airtight zipper products in Guangdong and other provinces (RMB 20-30 in the first treaty) have reached the commercial level. We look forward to their growth and present more high-quality and cost-effective products to donkey friends.

Just like the waterproof waist bag on the theme, the zipper design is in line with people's traditional habits. The zipper pocket does not need too many complex operations, and the use experience is greatly improved. Compared with the cumbersome waist bag with curling mouth, it is obvious that it has made too much progress. Technological progress comes step by step. It will be sooner or later to solve this part today and solve the problem of zipper resistance tomorrow.