Carson Gripz Eyewear Retainer (Fits Most Frames) Lab Tested to Hold the Weight of One Brick earning the seal of "Brick Tested Tough" Engineered from High Grade Braided Silicone Which Allows the Gripz to be very Heat Resistant Fits MOST Frames | For Sunglasses with Bigger Temples, Carson Offers a Larger Version of the Gripz Eyewear Retainer that is also Available on Amazon - Model # ER-30 (01) Available in 12 Unique Color Options Designed to have a secure hold and protect your eyewear under the harshest conditions Black Ash