Cool-Lite™ combines two lightweight, natural, performance fibers - premium merino wool and TENCEL®, a wood fiber. The result will keep you cool in even the most hot and humid conditions. COOLER FIBER BLEND, EVAPORATES HEAT, AWAY RESISTS ODOR An ultralight merino wool T-shirt for warm-weather travels, outdoor adventures and hot days close to home, the Sphere Short Sleeve Crewe features a classic crew-neck design that’s as versatile as it is comfortable. Made with soft 130gm Cool-Lite™ fabric that blends merino wool with natural Tencel®, the Sphere also features our corespun fibers, which feature a nylon core wrapped in merino wool for added strength and durability that maintains next-to-skin softness. The Sphere Crewe is quick to dry and gives you the optimal balance of comfort, breathability and odor resistance, while offset shoulder seams eliminate chafing when you’re traveling, hiking or commuting with a backpack. Awarded ‘Best in Category’ by Ultra Running Magazine for Wool Running Tops. Fabric weight: 130 Featherweight Fabric: 52% Merino Wool, 35% TENCEL®, 13% Nylon Product Weight: Medium = 103 g / 3.67 oz Fit: Regular Layer: First Layers Best for: Lifestyle Benefits: Breathability, comfort, odor resistance, quick drying Features: Cool-Lite™ fabric for comfort in warm to hot conditions, Corespun fabric for enhanced durability, center back length: 70.8cm / 27¾\" size M, Icebreaker pip label