Soft and anti-slip - made of TPR, soft and safe, wear resistant and friendly to your skin, also not easy to fall off with the anti-slip layer, giving you a comfortable wearing experience. 4 adjustable positions - designed with 4 adjustable positions, you can adjust the position of the corresponding straps to your comfortable position, one size fits both adults and kids, no more too loose or too tight. Fits all head sizes. Relieve the discomfort - adjustable extension strap hook can relax your ears and relieve the discomfort caused by face mask, wearing a face mask for a long time may cause ear pain or stress, this strap extender can change the friction and tightness degree of the face cover's loop, make it easy and comfortable to wear masks.