The Helly Hansen Alpha Shell Pant builds a 3-layer HELLY TECH(R) Professional shell with fully sealed seams to keep water out through a full day on the mountain. Four-way stretch and articulated knees let the fabric move through deep turns and knee bends instead of fighting back, so the waterproof protection doesn't come at the cost of agility. Mechanical ventilation zippers dump heat on hard downhill runs, and the pant layers cleanly over a base layer and insulator when temperatures drop further. What Our Gearhead(R) Experts Are Saying:"I dropped into a steep, technical line and never felt the shell tug or bind through the deepest part of the turn, even fully sealed against the wet snow underneath. Popping the vent zippers on the skin track home cut the heat build-up before I even broke a sweat."