Details A toasty baselayer for all your snowsport adventures 250g weight is Smartwool's warmest for frigid conditions Merino provides thermoregulating, odor-resistant benefits 8in zip neck can be opened to personalize ventilation Flatlock seams deliver chafe-free, layering-friendly comfort Shoulder panels eliminate top seam for smooth comfort under a pack Slim fit layers well beneath a midlayer and shell Absolutely perfect condition. So cute!