ThermaFlow 5.5 Jacket. Thinnest yet High Performance Insulated Jacket in the ADV Mid Layer Line. Five-year warranty. This is the highly performing yet thinnest insulation jacket in ADV the mid Layer Line, a softshell type jacket with the latest in technology insulation backing. Jacket is made up of a double-knitted wind-blocking shell, with unique graphene infused 3D block fleece backing. Reinforcements in elbows and seat area of lightweight stretch four-way stretch ripstop to improve durability. Shell is DWR C0/20: High performance Eco version of Dirt and Water Repellency Treatment. 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: