Adjustable Non-slip Glasses Strap

USED FOR: Suitable for glasses, sunglasses, reading glasses. Keep your glasses from falling off when you're exercising, playing, or reading. They will keep your glasses staying in place. Free your hands, no need to push your glasses again and again! ADJUSTABLE: Eyeglasses straps is adjustable, it can be lengthened or shortened (no tail), and comes in two sizes (large/small).Suitable for most people in sports, learning, swimming, running, writing, fishing, rock climbing. It can be glasses that don't slip off and can be hung around your neck when you're not using them. UPGRADED MATERIAL: Eyeglasses Retainers are made of food-grade soft silicone, which is more skin-friendly, anti-allergic, flexible and very comfortable. Specification: Style: sports Frame color: [A] 25cm children's style (4.3g), [B] 30cm adult style (4.5g), [C] 35cm adult style (5g), [D] 40cm foreign trade export extension style (6g), [E ]Straight line 30cm, [F] Basketball 35cm, [G] Football 35cm, [H] Rugb