By using high-performance waterproof coatings (such as TPU/PU) or professional-grade waterproof fabrics (such as nylon taffeta silk), the surface water droplets form a lotus leaf effect, sliding off easily with a gentle shake, and the interior remains dry at all times. 

Seamless adhesive bonding process: At the key seams, high-temperature adhesive bonding is used to completely block every path for water molecules to penetrate. Even after walking in heavy rain for a long time, one can remain safe and sound.