Because backpacks are used in special environments, higher requirements are placed on the materials and processes of the backpacks. All backpacks are sewn three times with stitches and back stitches, making them strong and durable. The buckle and other parts of the backpack can be protected against frost, smashing and deformation at 120 degrees Celsius. The outer material of the backpack is mainly 420D Oxford nylon, 1000D nylon, 600D or 1000D polyester (polyester), or 1000D CORDURA and other materials. 1000D material has high density and wear resistance, which is very suitable for use in the wild.
CORDURA is a well-known high-grade wear-resistant nylon roving fabric developed by DuPont of the United States. The abrasion resistance of this material is much higher than that of ordinary nylon or polyester, and it is lightweight. More than 90% of the backpacks of famous brands in the world use this prestigious nylon material. These materials can withstand a water pressure of 0.5m ~ 2m, keeping the objects in the bag dry. Some materials also have an anti-tear function. Once punctured, the break will not tear apart and expand.