The evolution of the traditional Pac boot. The Alpha Iceman features LaCrosse's legendary lightweight Alpha construction with 5mm of warm and comfortable neoprene lining the boot with the addition of a 9mm wool felt liner for added protection from the cold, up to - 120 F. This unique construction provides the warmth of boots up to 3 lbs. heavier! Available in Men's Med 7 -15 whole sizes only.