ThermaFlow 3.5 Jacket. Technical Performance Mid Layer Made of Leatt WarmYarn. Five-year warranty. Jacket is made up of a double-knitted wind-blocking shell made with Leatt Warm Yarn. Overlocked seams for comfort. Reinforced seat area of lightweight stretch four-way stretch ripstop to improve durability. This product meets latest U.S.A. PFAS standard. This product is Bluesign approved materials. This product is rated UPF-50+. Slimline stretch forearms reduce within the jacket. Fitted body to reduce bulkiness within the jacket. Pockets: One (1x) chest pocket with concealed YKK® zipper and low-profile puller (for under jacket comfort). YKK® main zipper. Reflective visibility detailing. Garment hanging loop.