This fully waterproof map case is exceptionally resistant to the demands of the trail. Totally welded construction and a super strong zip lock closure provide fully waterproof and dust proof performance. The PVC free TPU material is strong, durable, flexible and resistant to UV and the extreme cold. It can be folded numerous times for pocket storage without cracking or discolouring. Designed with a detachable neck strap and corner anchor points, the Sea to Summit TPU Guide Map Cases make map reading a little bit quicker and easier than it used to be.