Experience maximum warmth, ventilation, and flexibility with the Smartwool Intraknit Thermal Merino Base Layer Bottom for women. Smartwool's innovative 3D knitting technology creates an insulated, quick-drying and durable base layer perfect for a day on the slopes. With Merino Sport yarn, you get the best of both worlds: the natural benefits of Merino wool and the performance of polyester.   Stay warm and dry out on the hill!