Safety and Fashionable: The Glasses strap has a comfortable polyester braided cord, long lasting, very safe to wear when doing sports. Our glasses holder strap is classic black but also very fashionable. No worry about losing your glasses in doing sports, working or reading. Size: The unique and convenient combination design is very useful for your glasses that will meet your different glasses. The width of the place where the glasses strap is connected to the glasses are compatible with a width of 0.65cm. The thickness are compatible with a width of 0.3cm Comfortable and Adjustable: Keeps your glasses secure around your neck allowing sunglasses to be comfortably hung on your chest, or rest on top of your head. Adjustable toggle on cords ensures that straps will not easily fall off and are comfortable for all head sizes and shapes. For reasons of workmanship, please understand that the difference in length may be in the range of 2 cm and the thickness difference may be in the range of 0.2 cm. Applicable Occasions: Does not soak up sweat, get dirty, or fray and keeps your glasses strap for men and eyeglasses for women secure,Ideal for fishing, biking, hiking, rock climbing, snow skiing or just enjoying the great outdoors and indoor reading. With our eyewear straps will make your life more interesting and easier. Note - Ideal Gift: The unique and portable bag is included 4 pack eyeglass strap chains but in two sizes with same length but two different width size and the washable cleaning cloth. The cleaning cloth helps you to keep your glasses clean and clear without worries all day. The rest eyewear retainers can in the bag, very convenient for store. They are ideal gifts for glasses owners.