What Our Gearhead(R) Experts Are Saying:"The heat-mapped merino really works-lighter panels breathe on the climb, and the denser zones hold warmth when pace slows. The micro mock neck adds coverage without feeling restrictive."Cool mornings, shifting weather, and long approaches call for a baselayer that adapts as conditions change. The Everform All-Season Merino LS Baselayer uses a mapped blend of 1-ply and 2-ply merino to balance warmth and breathability throughout a full day on the trail. The slim, classic silhouette sits comfortably under midlayers, and the micro mock neck adds a touch of coverage when wind rises along exposed ridgelines. Merrow stretch stitching keeps seams smooth during dynamic movement, helping the baselayer stay comfortable during climbs, scrambles, and long-mile days. Designed with an ultra-soft merino blend rated for 25-50degF conditions, it transitions easily from outdoor objectives to everyday wear, bringing dependable temperature control to a wide range of environments.