The grippers for the arms of the glasses are a rubber moulding with a slot. These eyewear holders are substantially more durable than those using a rubber ring and have remained tight.
Grippi Cords Original Secure Glasses Grip Cord - Spectacle Spec Lanyard GORILLA
Grippi Cords Original - Secure Glasses Grip Cord - Spectacle Spec Lanyard Sports
Grippi Cords Grip Original - Secure Glasses Cord - Spectacle and Spec Lanyard
GRIPPi cords Sports Sunglasses Glasses Neck Cord Strap Retainer String Lanyard
GRIPPI Grip Original Glasses Cord Sport Activity Keep Glasses On GO
Grippi Grip Original - Secure Glasses Cord - Spectacle and Spec Lanyard
