NWT the North Face Traction Bootie Size 9 FORM MEETS FUNCTION. The slip-on Women's ThermoBall Traction Bootie pairs warm and comfortable insulation with a high-traction rubber outsole, making it ideal for base camp, après ski or shuffling through the snow to grab the morning paper. WATER-RESISTANT DURABILITY. Made with a recycled ripstop upper and coated with a Durable Water Repellent (DWR) finish, these highly durable winter shoes are water-resistant and warm.