The Oakley Flight Jacket glasses are a semi-frameless

no jacket/vest construction required which improves comfort

3 - Dual Compound - EXO - TR Kevlar Folding - 745g

This may have impacted on the flexibility of the knee pad and reduced comfort though

5 pack refills available via the link below

Ion E-Sleeve AMP Elbow Pads - S - Black Do Not Ship Internationally The Oakley Flight Jacket glassesAbrasion protection wasn't enough for ION's approach to functional and smart protective gear. That's why they amped up the E Sleeve. The Sleeve construction offers a compressed fit to make sure everything stays in place while biking. For added light impact protection ION uses a 3D shaped protection pad. The pre shaped form and strategic cuttings of the pad enable it to fit the natural posture of your elbows and make sure that the pad can follow those