Waterproof Sticker for Freestyle Libre 3 Sensor Covers-50 PCS Waterproof for Freestylelibre3 CGM Patches Adhesive (For Freestyle Libre 3 (6.5Cm), 50 Pcs). Waterproof & Long Stay - This transparent libre3 freestyle adhesive patch is waterproof and breathable, it allows your skin freely breath while protects.