New for 2011/2012, the Arc'Teryx Phase SV Comp LS is a performance base layer that's built for high movement, stop-and-go activities. The Phase SV Comp LS features two Phasic fabrics, utilizing warmer material in strategic areas like the neck, shoulders and the front, where heat loss naturally occurs. Both fabrics ensure superior moisture wicking and quick-drying properties, which keep you comfortable when you're sweating hard. When gloves aren't an option, the Phase SV Comp LS's long, roll-over cuffs cover your hands and fingers for extra warmth. This is an outstanding piece of long underwear for all kinds of uses from skiing to mountain biking.

• UPF rating of 50+ blocks harmful UV rays from damaging your skin
• Phasic fabric wicks moisture and evaporates quickly to improve overall warmth and comfort
• Flat seams don't aggravate sensitive skin or cause chafing
• Antimicrobial fabric treatment stop odor from building up