A base layer guaranteed to warm your core. The Men's Core Midweight Crew is crafted with our 260gm Signature Blend fabric, providing enhanced 4-way stretch, superior breathability and thermoregulation, while melding the luxuriously soft on-skin properties of rayon from bamboo and the unrivalled odour resistance of merino wool. It's an underlayer that punches well above its weight in the warmth department and handles the alpine and the late afternoon apres.