Thanks to the body temperature regulating properties and breathability of our responsibly sourced Merino wool, the Merino 150 Base Layer Tank allows you to take on any challenge at any time of the year. This base layer features Core Spun technology—which features Merino wrapped around a nylon core for added durability while still keeping the comfort of ultra-soft, responsibly sourced Merino next to skin. The smooth merrow stitching wraps from side to front for a more body-enhancing look—helping you look good and feel good too.