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 Sports Sunglasses Glasses Cord Strap Retainer String Lanyard Gift
Sports Sunglasses Glasses Neck Cord Strap Retainer String Lanyard *GRIPPI cord*
Sports Sunglasses Glasses Neck Glasses Cord Lanyard Straps Neck Spectacle & Sun
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Non Slip Glasses Strap Sports Sunglasses Neck Cord Eyeglass Holder UK
Sports Sunglasses Neck Cord Strap Eyeglass Glasses Rope String Lanyard Holder UK
