The Icebreaker Men's 150 Short Sleeve Crew top is made from light, soft Bodyfit 150 fabric. Designed with set-in sleeves & classic styling, the Short Sleeve Crewe is so thin & light that it is perfect for layering under a long-sleeve top or sweater. Offering a silky soft feel by combining merino, with a touch of LYCRA to give the perfect fit. Features Bodyfit Base Layer 150g/m Pure Merino Wool Non-itching/ Odour resistant/ Quick-drying Merino, with a touch of LYCRA 96% merino wool, 4% elastane Close to body fit Glossary Merino Wool: Wool from Merino sheep that provides good insulation, durability, odour resistance & moisture control. Soft & itch-free, it is ideal for base layer garments.