Waterproof Sticker for Freestyle Libre 2/3 Sensor Covers-100 PCS Waterproof for Freestyle Libre3/2 CGM Patches Adhesive (For Libre 2/3 (9Cm), 100 Pcs). Waterproof & Long Stay - This transparent libre 1/2/3 freestyle adhesive patch is waterproof and breathable, it allows your skin freely breath while protects.