The Men's Gamma LT Jacketis the result of intelligent, purpose driven design and Arc'teryx' commitment to craftsmanship. Made from lightweight, hardwearing Wee Burly softshell fabric, the Gamma LT Jacket is strong, light and provides moderate warmth and weather protection. The fabric blends wind resistance with air permeable comfort, has elastane fibres for built-in two way stretch, and is exceptionally durable for its weight. Its wind and water resistance is complimented with a textured backing that adds thermal comfort and moisture transport during active use across a range of weather conditions and levels of activity. This versatile performance makes the Gamma LT an essential softshell for active alpine and backcountry endeavors.To facilitate heat dump without inadvertent opening, the Gamma LT employs the ingenious No Slip Zip. The zip's unique construction involves a series of bumps on the top few teeth to prevent self-opening, but, as in many Arc'teryx pieces, the zip may be rapidly opened with a single hand for almost instantaneous heat dump.Alpine versatility requires exceptional freedom of movement, so Arc'teryx leverages articulated patterning, underarm gussets and stretch materials to help the Gamma LT move with the body. The Arc'teryx regular fit fits easily under a belay parka, allows room for midweight layers, yet is streamlined and athletic. The Gamma's hip length hem and streamlined patterning allow it to lie comfortably under a harness or pack belt. Stretch gusset cuffs provide a secure fit, but push up easily for ventilation.