When you're out for a full day of winter fun, you don't wantcold air and discomfort to set you back. The Icebreaker BodyFit 260 1/2-ZipTech Top is a merino wool top that keeps your core temperature regulated: thewool's air pockets trap your body's heat in while the fibers absorb andrelease your sweat so you stay comfortable when moving fast on snow or icyground. The zip collar allows greater control over your level of warmth orventilation. The soft fibers sit snugly against your skin while forward sideseams eliminate chafing while you move, and the regular fit allows for a little more wiggle room. Offset shoulder seams accommodatebackpack straps. A drop-tail hem providesextra rear coverage. With this level of snug comfort and protection, you'll be able tofocus on the line- or trail-at hand.