Silicone Imported No Tail Design - our glasses strap has a no-tail design due to double sliders. The sunglasses strap is invisible on your head and wont get tangled in your hair, unlike other eyeglasses strap do Adjustable Length - glasses strap for men women are easy to set on your head. Eye glasses holders around head will fix the glasses on your head tightly Soft & Anti Slip Tips - our sunglass strap for men has unique tips which prevent glasses from slipping. The soft silicone tips of the glasses lanyard will not squeezehead 3 Size Options - the full length of our eyeglass holder sunglass strap is 13. The adjustable eyeglass strap is a perfect fit for a head of any shape and size Extra Durable - a steel wire of eye glasses holders around neck with an extra layer makes eye glasses string strap is durable and quite comfortable to wear throughout the day. Due to the extra strong material, the eyeglass lanyards for men will not wear out as fast as other glasses holder strap do For Any Activities - glass straps for men designed to keep a perfect balance of style and functionality, eye glass holders necklaces will fix the glasses securely while your working out. The glasses strap for women is perfect for daily usage as well 3 Pack + Bonus - each set has 3 glass string strap and a cleaning cloth you can use to clean the lenses of your glasses