Made with a tough Pertex® Quantum outer fabric and lining, the Photon Pants feature additional Pertex® Shield 2.5 layer reinforcement patches on the seat, knees and kick patches for added durability in high wear areas. 100g/m² of Stratus™ recycled insulation will keep you warm even in extreme cold. Full-length side zips ensure the Photon Pants are easy to put on or take off over mountaineering boots, and can also be used for ventilation. The included stuff sack makes them easy to stash away until needed.