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 Sports
Grippi Cords Original - Secure Glasses Grip Cord - Spectacle Spec Lanyard ECO
Grippi Grip Original - Secure Glasses Cord - Spectacle and Spec Lanyard
Grippi Cords Grip Original - Secure Glasses Cord - Spectacle and Spec Lanyard
NEW Grippi ORIGINAL Secure Spectacle / Glasses Cord Holder / Spec.Lanyard
NEW Grippi ORIGINAL Secure Spectacle Glasses Cord Holder Specs Lanyard or ZEISS
