100% medical grade silicone; Made in China; Reusable 50-100x with proper care; Invisible SkinFinish ™; Skin safe German medical grade adhesive; Sweatproof and waterproof; One pair; Measures approx 4" in diameter; Revolve Style No. NOOD-WI18; Manufacturer Style No. ND24NSNSAD-4; One size fits most