A base layer guaranteed to warm your core, the Women&';s Midweight Crew is crafted with our 260gm Signature Blend fabric, providing enhanced 4-way stretch, superior breathability, and thermoregulation. It effectively melds the luxuriously soft on-skin properties of rayon from bamboo with the unrivalled odour resistance of merino wool. This underlayer punches well above its weight in the warmth department and handles both the alpine conditions and the late afternoon apres. Material Blend 62% Rayon from Bamboo, 30% Merino Wool, 8% Elastane Weight Midweight 260gm Fit Slim Fit Core Fabric Technology Signature Blend of Merino Wool and Rayon from Bamboo Stretch 4-Way Ultra-Durable Stretch Construction Flatlock Seams, Sculpted Panels Hem Scoop Bottom Protection UPF50+ Sun Protection Certifications 100% Certified Non-Mulesed Merino Wool, Okeo-Tek 100 Certified