The Men's Psiphon SV Pant is Arc'teryx's warmest softshell for ice climbers and alpinists. Its Fortius 3. 0 softshell features a four way stretch and an air permeable shell bonded to a heavyweight fleece for mobile warmth. Burly Double Weave reinforcements prevents crampons from tearing up the cuffs, and webbing loops at each cuff accommodate gaiter straps not included. The Psiphon also features low profile suspenders that you can remove, a zippered thigh pocket, and a drop in thigh pocket that you can access with gloves on.