Merino Blend Midweight Base Layer Top

The Burton Merino Blend Midweight Base Layer is Burton's warmest base layer option, built for riders and active outdoor enthusiasts who need reliable insulation without bulk. At 245GSM, it sits in the midweight range—substantial enough for cold days on the mountain, versatile enough to wear hiking or lounging post-session.

Constructed from a 57.6% Merino Wool, 38.4% TENCEL™ Lyocell, and 4% Spandex blend in a Merino Interlock knit, this mid-layer delivers natural temperature regulation and breathability with a softness that synthetic base layers rarely match. The slim, performance fit features 360° four-way stretch for unrestricted movement, while thoughtful details like chafe-free Softlock seams, hidden thumbholes, a locker loop, and a left-side drop-in thigh pocket round out the functional package. Double-needle stitching on the sleeves and hem adds durability, and OEKO-TEX 100 certification backs up the sustainable construction. Burton backs it with a lifetime warranty.

This base layer suits riders and hikers who run cold and want the natural odor resistance of high-content merino wool (50%+) without sacrificing stretch or packability. It layers cleanly under a mid-layer or shell, making it a strong anchor for any layering system on a long day out. If you find synthetic base layers scratchy or you're tired of mid-ride odor issues, this is the upgrade worth making.

• Is this a base layer or a mid-layer? It's designed as a base layer—the slim fit is optimized to sit directly against skin and layer cleanly underneath a mid-layer or shell.
• Does the merino wool make it itchy? No—Burton specifies the use of soft wool fibers in a Merino Interlock construction, and the TENCEL™ Lyocell content adds additional softness against skin.