Description ***Outdoor Research&';s Trim Fit is designed to contour the body for a streamlined, athletic fit*** The Outdoor Research Men&';s Deviator Fleece Half Zip is a high-performance midlayer designed for active pursuits where breathability and lightweight insulation are critical. Built with VerticalX(TM) Octa insulation and hybrid-mapped construction, it provides targeted warmth at the core while allowing excess heat to escape through stretch panels in high-output zones. The result is efficient temperature regulation during movement, making it ideal for hiking, hunting, and backcountry travel. A deep front zipper allows quick ventilation, while the athletic fit and stretch design ensure unrestricted mobility and all-day comfort in changing conditions. Sizing Size Chest Waist Arm Length Small 36 - 38.5" 29 - 31.5" 32.5" Medium 38.5 - 41.5" 31.5 - 34.5" 33.5" Large 41.5 - 44.5" 34.5 - 37.5" 34.5" X-Large 44.5 - 48" 37.5 - 41.5" 35.5" How to Measure: Chest Measure around the fullest part of your chest, keeping the tape parallel to the floor and positioned under your arms. Waist Measure around your natural waistline at its smallest point. Arm Length With your hand on your hip, measure from the center of the back of your neck, across the shoulder to the elbow, and down to the outer wrist bone. Specs Weight 14.11 oz Length (Center of Back) 28.5" Material Front/Back Body: 100% Polyester CollarArms & Underarms: BluesignA(R) approved 94% Polyester 6% Spandex Manufacturer Warranty Lifetime