Sea to summit tpu guide waterproof case for smart phones description our tpu guide waterproof phone cases are a slim yet robust solution for protecting and using your phone in any conditions rf welded thermoplastic polyurethane tpu and the ziploc triple roll velcro closure keeps this soft case both watertight and slim the tpu is pvc free strong flexible durable uv and extreme cold resistant die cut attachment points round out this tough little package iphone 6 and 6s will fit in