The Desoli Light Half Zip is a slim-fit base layer crafted from Solid Merino™ fabric — a 150 g/m² knit in pure 17.5 micron merino wool that stretches, breathes, and naturally regulates body temperature. The high collar and half-zip construction allow precise ventilation control, while a slight back drop and extended sleeves with thumb loops improve coverage and comfort during active use. Because the fabric is free from synthetic blends and chemical treatments, it is fully biodegradable and recyclable, making it a genuinely circular garment suitable for everything from summer trail runs to winter ski touring.