When you need a break, you can hang the back of your head glasses strap around your neck without worrying about it coming off.
Pilotfish No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses, Eyeglass
No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses, Eyeglasses, Glasses
Pilotfish No Tail Adjustable Eyewear Retainer Cable Strap: Sunglasses 16" Panda
