Icebreaker Size Chart A stretchy zip-neck baselayer shirt ideal for long, high-output days on the bike, trail, skis or the rock, the updated 200 Zone Long Sleeve Half Zip is the ultimate lightweight technical baselayer top. The Zone features Icebreaker's BodyfitZONE(TM) construction, which combines lightweight, odor-resistant stretch merino wool with strategically placed merino mesh panels to help regulate temperature during stop-and-go days on the trail or in the mountains. Raglan sleeves and underarm gussets allow for unrestricted range of motion, and flatlock stitching eliminates chafing during dynamic days out in nature. Features: - BodyfitZONE(TM) thermally-mapped fabric zones to trap heat when you need it and release it when you don't - LYCRA(R) content for stretch and mobility - Zip neck collar for temperature regulation - Strategically placed merino mesh for ventilation - Flatlock seams prevent chafing - Raglan sleeve construction for mobility - Underarm gusset for comfort and mobility - Dropped front and back hem for added coverage - Center back length: 76.5cm/30", size L - Icebreaker heat transfer logo - Fit: Slim - Fabric: Body: 96% Merino Wool, 4% LYCRA(R). Eyelet: 98% Merino Wool, 1% LYCRA(R), 1% Nylon - Weight: Medium = 290 g / 10.22 oz - Alternate images may show different colorways, yet accurately display product features