DoHope 25Pairs Mens Nipple Concealer Protector Invisible Nipple Covers Prevent Nipple Chafing Sticker Patch 3cm/3.5cm Outer MaterialThermoplastic polyurethanes (TPU) with Air Hole, Breathable, Sweatproof, and Supple. Inner Material: Medical Hypo-allergenic Adhesive, Fixable, Durable and Comfortable, painfree to remove, no adhesive residue leave. 30mm Diameter, Full Covering Areolas. As thin as A4 paper, tightly faying, no upwarp. Package Include: 25 Pairs (50pcs) Round Shade Nipple Cover, Nipple Concealer. Nice way to stop nipples chafing when running, cycling or any other sporting. Easy to apply and invisible. They don't make it look like you have something covering you nipples.