Be prepared for frigid temperatures with the Patagonia Capilene® 4 Expedition Weight Bottoms and tackle your next outdoor adventure comfortably. Featuring Polartec® Power Dry® High Efficiency™ fabric in Patagonia’s warmest and most breathable base layer, the Capilene® 4 Expedition Weight Bottoms from Patagonia are ready for your bottom, no matter what the conditions.