TPU Guide Waterproof Case for SmartphonesThe 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 zip lock, triple roll hook and loop fastener keep 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.