Durable Materials:Made of environmental friendly, durable and premium Elastic rope nylon material, No allergies, durable and comfortable to use.Soft, durable, adjustable, Fits most frames, colorful, fun , washable. Multi-Functional:The sports glass strap and ear hook sets reduce eyewear slippage and prevent loosing glasses from face.Keep your glasses safe when you doing indoor or outdoor sports or activities.They can be used together or alone. Colorful Kids Glasses Straps:12 Pack Colorful glasses holder strap are specially designed for children, suitable for many different brands and different colour of sunglasses, nearsighted glasses, reading glasses, prescription glasses,safety glasses and so on. Adjustable Cartoon Buckle and Anti-skid Metal Loop Design:Metal loops at both ends of the straps could be slipped on and off easily, and help to fasten the strap with glasses firmly.Cute cartoon-shaped plastic buckle is decorative and also adjustable to guarantee secure fixation.All kinds of cartoon adjustment buckles are randomly matched. More Occasions:These eyeglasses strap and ear hook set is designed for keeping kid's glasses secure no matter your kids are doing sports or any other activities. Also allowing glasses of kid to be comfortably hung on their chest, or rest on top of the head.