The Rab Ascendor Summit's body-mapped construction is intended to protect and adapt to your output and the conditions more efficiently. The hood is windproof Pertex® Quantum Air lined with ThermicTM G fleece for soft stretch comfort around the face and wind protection on wild ascents. The front body, shoulders, and upper arms are lined with an ultra-warm and wicking fleece with windproof Pertex® Quantum overlays, providing core warmth, abrasion resistance, and weather protection. Finally, the waist, sides, and underarms are lined with a breathable, lightweight Thermic TM G fleece that provides breathability, stretch, and low bulk for a seamless harness fit. Ascendor Summit Hoody - Men's Hybrid Hooded Fleece/Softshell Jacket