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A co-injected temple is an eyeglass arm that is made from two different materials that have been permanently bonded together in a single piece. The design usually combines a rigid, durable material for the temple's main structure with a soft, rubber-like material for enhanced grip and comfort. It is a feature most often found in sports and performance eyewear.
read more about co injected temple on eyeglass frames ...The term "co-injection" refers to the manufacturing process used to create the temple. During this process, two different types of plastic are injected into a mold at the same time or one right after the other. This creates a seamless, chemical bond between the hard and soft materials. The result is a single, durable temple arm with two different textures and properties.
The main benefit of a co-injected temple is the secure, non-slip fit it provides. The soft, rubbery material is typically placed on the temple tips that wrap behind your ears and sometimes on the inner side of the arm. This grippy material helps the glasses stay firmly in place, even when you are active or sweating. It also feels softer and more comfortable against your skin than hard plastic.
This design feature is a hallmark of sports and performance sunglasses and eyeglasses. It is ideal for activities like running, cycling, and golfing where you need your glasses to stay put. Because of the secure fit they provide, co-injected temples are also very popular in children's eyewear and in safety glasses.
Beyond the practical grip, co-injection allows for unique styling options without the use of paint. Designers can fuse two contrasting colors of plastic together, such as a black outer temple with a bright red rubber interior. Because the color is part of the material itself rather than a surface coating, it will never chip, peel, or scratch off, keeping the frames looking new even after years of heavy use.
No. The soft material is not glued on and will not peel off. It is chemically fused to the hard plastic during the co-injection molding process, creating one solid piece.
Because it is a single fused piece, the grip section cannot be replaced on its own. If the grip material becomes damaged, the entire temple arm would need to be replaced.
Yes, they are an excellent choice. Many of the rubbery materials used for the grip are designed to become even tackier and grippier when they get wet, ensuring a secure fit.
You should ask your optician about frames with co-injected temples if you lead an active lifestyle or if you have had trouble with glasses slipping down your face in the past. They can show you a variety of sporty and everyday styles that use this technology to provide a comfortable and secure fit that lasts all day.
WX Sierra Matte Black Frame. Wiley X. https://www.wileyx.com/products/wx-sierra-ac6sra05f. Accessed April 3, 2026.
WX Sierra Matte Graphite Frame. Wiley X. https://www.wileyx.com/products/wx-sierra-ac6sra07f. Accessed April 3, 2026.
Nike 7119 Glasses. RX Safety. https://rx-safety.com/shop/eyeglasses/nike-7119-prescription-glasses/. Accessed April 3, 2026.
Bolle Tryon Safety Glasses. RX Safety. https://rx-safety.com/shop/master-safety-glasses/safety-brands/bolle-safety-glasses/bolle-tryon/. Accessed April 3, 2026.
Bolle Rush+ Safety Glasses. RX Safety. https://rx-safety.com/shop/master-safety-glasses/bolle-rush/. Accessed April 3, 2026.