Material: Made of Non-toxic memory EVA foam with sticky ring.Helmet Pads USE high quality EVA foam material, soft and durable, providing maximum comfort and stability.Designed as a fit kit, the existing pad in your helmet makes the helmet more fit for comfort/tightness. Package Contents: Total 19 pieces(9pcs foam pads + 10pcs sticky Hook&Loop circles). Decent Comfort: To replace the worn out or missing pads in your helmets to ease some pressure off your temples. Perfect for anyone that is trying to improve the fit of a helmet or other headgear and cheaper than buying a new helmet. Washable and quick-drying. 3M Adhesive: Super sticky, they're not going anywhere once placed that's a super good thing because no one wants to lose a pad inside the helmet, they're nice and cushioned as well to protect adequately from bumps and bruises. The adhesive parts are separate which actually makes installing and moving easier. Widely Use: Perfect for different helmet, motorcycle bike helmet, football helmet, 3D printed helmet, custom cosplay helmet.