Waterproof & Sweatproof: funpatch Tandem Mobi pocket patches are waterproof and stay secure even when showering, sweating and swimming. Keep your mobi pump stable and snug while you wear it. Gentle for All Skin Types: funpatch Tandem Mobi pocket patches is made of cooling silky fabric with hypoallergenic & latex-free adhesive, making it safe and harmless to all skin types.