100% Nylon Imported Unique Designed Non-Slip Clip Loop - Unlike any other similar eyeglasses string holder that barely work, our sunglasses strap features an advanced clip loop to offer 100% protection against slipping off. For Wide and Narrow Temples - Our eyeglass chain for men are designed to provide a snug fit for all types of frames while maintaining maximum grip. This glasses holder is perfect for small and large arms! Adjustable Length - This eyeglass holder strap is 29" long and comfortable to wear for any head and neck size. You can adjust eye glass strap as you like for a tight fit or loose off-the-neck fit. 5 Pack + Bonus - Our eyeglass chain for men come in black colors to complement your sense of style while doing your sports. This eyeglass holder strap also comes with a surprise bonus! Lifetime Warranty - If something happens with our straps for eyeglasses or it doesnt fit for you - just contact us, we will solve your issue!