NWTS Columbia Women's Minx Slip Iii Mid Calf Boot -no flaws -softest inside ADVANCED TECHNOLOGY: The textile upper features our signature waterproof and breathable membrane construction, that will keep your feet dry and warm across a wide range of winter fun. HIGH-TECH INSULATION: Utilizing our Omni-HEAT thermal reflective lining, your feet will be happy and warm no matter how deep the snow is outside. SLIP-ON STYLE: Designed for warm function with a maximum flex upper and quilted top, you'll find these boots are quick and easy to wear wherever you go. COZY COMFORT: It features a deep fleece lining with 200g insulation, along with a removable contoured PU footbed for long lasting comfort and warmth. ADVANCED TRACTION: Our signature Omni-GRIP non-marking traction rubber outsole providing versatility for all winter wear without worry during indoor wear.