Sea To Summit Tpu Waterproof Guide Map Case nylon Lightweight, high performance design, Anchor points on corners for versatile attachment Super strong Ziplocclosure, Individually tested - water and dust proof UV resistant for superior long lasting clarity, Flexible and crease resistant - can be folded to fit in a pocket Abrasion resistant, high strength, PVC free, TPU material Totally welded construction - no stitches, Detachable neck strap As an airproof barrier in our Air-Sprung Cell and Self-Inflating mats. Here it is used in a liquid-extruded format  the TPU bonds to the face fabric for the highest possible level of reliability. As a waterproof barrier in our Accessory Guide Cases and Map Cases; and in several models of our Dry Sacks. Here it is used in a film format, where its superior flexibility (even in cold weather) and waterproofness are key. As a waterproof barrier in the Nylon Folding Bucket. This particular film is also food grade  ideal for water storage. As a transparent window in View Dry Sacks and Travelling Light products  allowing you (and TSA inspectors) to see the contents.