Soft material, ultra-comfortable, very soft on the ears and nicely keep glasses on during sports or rough boy play. It is flexible enough for you to slide glasses off your eyes while reading / doing close up stuff. Will not easily fall off and are comfortable for all head sizes and shapes. Double adjustable beads, you can sufficiently make them fit to your liking. Rubber fittings ends fit over most brand sunglasses. It is precisely cut without any excess strap dangling down your back, short enough to securely wrap around your head and long enough to take glasses off your face and hang them around the neck when not in use. perfect for securing and decorating your reading glasses, eyeglasses and sunglasses. Perfect for fishing, biking, hiking, skiing, rock climbing; perfect for outdoor sports or normal everyday use. Type:Eyeglasses Holder Straps Weight:0.4oz(14g) colour:black Material:Silica gel size:20cm Package Contents: 4 x glasses rope Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.