When temperatures drop, our Merino Sleeveless Winter Baselayer delivers core warmth without compromising the freedom of arm warmers, bib straps or layered winter kit. A heavier Superfine 17.5 Micron Merino3DHex™ chest panel traps warmth across the chest where you need it most, while a lighter-weight merino mesh rear maintains breathability. The sleeveless silhouette eliminates bulk under tight winter jerseys. A two-tone Natural / Black colourway for a clean, considered aesthetic — engineered to disappear under your kit and let the wool do its work.