The men’s Eider Wax Halfzip Skivvy 2020 is a lightweight thermal that balances warmth with breathability, stretch, and an active fit, the perfect  baselayer that will take care of you in the mountains. From fall hikes to spring skiing, the Wax Skivvy offers lightweight warmth and moisture management for three-seasons of outdoor adventures. An Active fit and flatlock seams make it a comfortable first layer, while the half zip allows for airflow when things heat up.