Shop all iPhone XS Max Waterproof Cases. Each Skinit iPhone XS Max Waterproof Case is built to protect your iPhone XS Max from water, snow, sweat and dirt. Keeping your iPhone XS Max safe and looking brand new. Each iPhone XS Max Waterproof Case is made with a fully-enclosed water proof phone casing that maximizes cell phone functionality and water proof protection. Browse all waterproof iPhone XS Max phone cases and buy a Waterproof phone case that is best suited for your needs.