Arc'teryx Men's Gamma SL Pants - Forage regularPreviously known as the Gamma Lightweight Pants, the Gamma SL Pants are the lightest softshell pants in Arcteryxs Gamma range, ideal for long distance hiking when weight matters. Made from a double weave blend of nylon and elastane called Fortius 1. 0, theyre both breathable and durable. A lot of thought has gone into the shape tooand while theyre a touch slimmer than the regular Gamma Pants, those articulated panels give full freedom of movement.