This waterproof accessory case is exceptionally resistant to the demands of the trail or the river. The PVC-free TPU material (thermoplastic polyurethane) is strong, durable, flexible and resistant to UV and extreme cold - so it can be used again and again without cracking or discoloring. Fully welded construction with die-cut corner anchor points and neck strap. The top closure folds the tacky TPU film against itself three times and then secures this with double Velcro - waterproof enough for brief submersion for electronics.