?Water-resistant Interlock zipper on front outer flap * ?High-density ULTRASTRETCH closed cell Pressure Bonded sealed seams in front chest * ?All seams are double glued, blindstitched, and curved for maximum strength and flexibility * ?Heat-retaining lining made of bamboo charcoal infused fibers and recycled fibers * ?Abrasion-resistant, flexible fibers that minimize wear-and-tear from on/off and leashes