Some days call for more breathability. Designed for big-vert efforts, high-energy movement, and warmer conditions, the Atomic Baselayer Short Sleeve M keeps comfort dialed in and performance focused. Crafted from a merino-wool blend with seamless, body-mapped zones, this men’s short-sleeved baselayer top balances airflow and warmth precisely where you need it. Soft next to skin with four-way stretch, it moves with you through every curve for maximum performance. An adaptive baselayer top for intensity, efficiency, and active days on the mountain.