Finding a baselayer you’ll reach for as often as the Mountain Equipment Women’s Eclipse Hooded Zip T-Shirt is rare, so don’t miss out on it while it’s here, or you could wait years to find another like it. Soft Polartec Power Dry 200 fleece holds a layer of breathable, lofted insulation against your skin to keep you warm but not overheated in the cold. Mountain Equipment cuts the Elipse in a slim, tailored fit, which allows you to sneak a slim baselayer under the top, but not much else. Wear it on its own for cold-weather runs, or as a midlayer when you’re skiing or climbing in snowy, icy conditions. An asymmetrical zipper allows you to add airflow when you need it, and the top’s longer length ensures it won’t ride up when tucked into ski pants or pulled over running tights. Thumbholes keep you cozy when you’re done for the day, and a bluesign-approved Polygiene treatment equips the Eclipse to resist odors without harming the environment you play in.