Their quest for the ultimate in performance means they take no short cuts. Anywhere. The highest quality materials, the most thorough of tests, it's what makes Mountain Hardwear the stuff you want to have with you when things get ugly. That's why you see their gear on elite athletes and in places like Annapurna, Antarctica or when trekking in the Swiss Alps. It's this relentless drive to create the absolute best that makes Mountain Hardwear. MicroClimate Zoning™ construction follows the body's natural hot and cold spots, using warm, compressible Thermic Micro™ to insulate your core, and high-stretch side panels to add breathability and stretch where you need it most. An alpine essential.