Our technical, cold-weather base layer top for highly aerobic days, the 260 Zone Long Sleeve Crewe features zoned ventilation panels for active temperature regulation and ample breathability.Features BodyFitZone™ - features breathable zones for high intensity activity Thumb loops keep your sleeves in place and hands warm Raglan sleeve construction for mobility Gusseted underarms for mobility and comfort Flatlock seams to prevent friction Drop tail hem for added coverage Back High Point Shoulder to Hem: 72.7cm based on size M Specs Product weight: Small= 226 g / 7.96 oz Back High Point Shoulder to Hem = 72.7cm (Based on Size M) Fabric content: Body: 97% Merino Wool, 3% Elastane, Panels: 100% Merino Wool, Eyelet: 98% Merino Wool, 1% Elastane, 1% Nylon Fabric weight: 260 Midweight Care: Machine wash warm. Wash with like colors. Do not use softeners. Fasten all closures to wash and dry. Do not bleach. Do not tumble dry. Line dry in shade. Warm iron. Do not iron print, trims and accessories. Do not dry clean.