Before you head into the hills to climb icefalls or ascend a glacier route, slip into the stretchy, insulating Rab PS Bib to comfortable lock in your body's heat beneath your snow-shielding layers. This durable Polartec Power Stretch long underwear bib moves with your kick steps and every swing of the axe. Its one piece design prevents the cold from creeping into your mid-section as it tends to when when you're wearing a separate top and bottom.