Built with an exclusive merino blend, this midweight half zip keeps you charging outdoors, even when the winter temps try to hold you back.

The Basis Midweight Merino Half Zip is in a league of its own as your go-to baselayer for all-day warmth and breathability on the chilliest days. Built with a proprietary textile developed exclusively for Stio that interweaves merino wool with synthetic filaments, this half zip offers stretch comfort and wears as both an extra layer during cold lift laps or on its own for off-season trail runs.