Put glasses in place for quick and easy putting on and off - each pair of sunglasses neck straps are 11.8 inches long and feature black square two-hole slider fasteners that adjust the tightness as needed.The tubes at both ends clamp the legs tightly, securing the glasses to the head as they are tightened.When not in use, hang the lanyard sunglasses holder around your neck so you never lose your sunglasses again

Comfortable, Durable and Stretchable - Made of a mix of high-quality nylon and spandex, this glasses strap is sturdy and will not wear out for maximum strength and elasticity.Soft materials and lightweight design make it feel natural and comfortable.They are not only fashion eyewear accessories, but also completely functional

Each eyeglass holder has a circular plastic regulator that easily slides up and down on the rope to tighten or loosen it to better fit the shape and size of your head, and the woven elastic band material ensures It can stretch to 20 inches.This also means that glasses retainer straps are suitable for people of every age from infants to adults and in between

Sports accessories and outdoor essentials for men, women and kids - for exercise, training, fitness and sports: summer water sports, fishing, sailing, boating, hiking, hunting, shooting, running, baseball, cycling, driving and military.Suitable for standard size frames (plastic/metal/wood/rubber/acetate).Suitable for polarized sunglasses/reading glasses/safety work goggles/anti-fog glasses/motorcycle riding glasses