Icebreaker Size Chart A lightweight men's base layer top that's perfect for adventure and everyday training, the 150 Zone Long Sleeve Half Zip features 150gm corespun merino with just enough LYCRA(R) to maximize flexibility. It has a slim cut for a sleeker profile that doesn't drag you down as you move. The mesh details help keep you nice and ventilated, while the zoned body mapping technology and zip neck collar offer excellent temperature control. Features: - Corespun fabric for enhanced durability - Zoned body mapping technology for optimal thermal regulation - 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 - Fit: Slim - Center back length: 75cm/29 1/2" size L - Fabric: Body: 83% Merino Wool, 12% Nylon, 5% LYCRA(R) / Eyelet: 84% Merino Wool, 15% Nylon, 1% LYCRA(R) - Alternate images show different colorways, yet accurately display product features