When it's cold enough for icicles to form on your beard, but the promise of first tracks is too strong, the Basis Midweight Merino Tight delivers elevated performance and thermoregulating properties to keep you warm and dry throughout. The secret to its comfort and warmth is Stio's proprietary PeakWool™ fabric, a powerful blend of soft yet resilient Tencel, nylon and elastane fibers with the warmth and wicking of 56% merino wool to deliver strength, comfort and range of motion.