Just like you have a quiver of skis, you need to have a quiver of baselayers to be optimally prepared for whatever the mountain might throw at you. On the dreamy days when you get to grab the big planks, toss on the MONS ROYALE Olympus 3.0 Half Zip Long Sleeve Top. This heavyweight merino wool top is the warmest around for the coldest days when the snow is nuking and free refills are plentiful. Thanks to the excellent properties of merino, this shirt will keep the moisture wicked and the the airflow going, even while they're maintaining your toasty warmth while you work for your turns.