We ask a lot of our baselayers, and the Backcountry Pines Microgrid Ultra - Lt Baselayer 1 / 4 - Zip Top delivers on all fronts. This form - fitting baselayer is warm, moisture - wicking, and odor - resistant to keep us comfortable, whether we're deep in the backcountry or carving down groomers at the resort. The ultralight microgrid material features a heavy dose of stretch, so we can make quick pivots at the drop of a hat and dance through the trees at lightning speed. The quarter - zip design lets us circulate cool air after a run down the moguls, and thumbholes keep our sleeves in place while we work up steep skintracks.