Tips: 
Your order length is Inner Length, and Total Length = Inner Length + 5 cm.
TPU (thermoplastic polyurethane) coated airtight and waterproof zipper.
Offers liquid and air resistance for the purpose of comfort, safety or other special aims.
ECO friendly.
Smooth surface.
Has good weldability (high-frequency welding) with TPU, PVC, EVA,PET and other thermoplastic material. 
Has good flexibility and resistance to high and low temperatures.