Go one size up: Choose one size up from your usual size for a comfortable and secure fit. Combining city style with mountain-ready tech, the ThermoBall Progressive II Waterproof Zip-Up Winter Boots don't look like insulated boots, but that's exactly what they are.

They're engineered with DryVent technology that's not only waterproof but breathable for all-day comfort whether you're spending the day indoors or out. Thermoball Eco insulation will keep your feet toasty even when it's damp. The grippy rubber soles and supportive OrthoLite footbeds mean you can pound wintery pavements with confidence and comfort.

• UPPER: Water-repellent, recycled P.E.T. ripstop upper.
• Waterproof DryVent bootie construction.
• Non-PFC durable water-repellent (non-PFC DWR) finish to help keep feet dry.
• Lightweight ThermoBall Eco insulation retains warmth even when wet.
• TNF branded webbing pull-loop at heel for easy pull-on.
• PU-coated zip closure.
• Translucent mono-mesh overlay on vamp for a see-through effect to the quilting below.
• Comfortable OrthoLite footbed made with 5% recycled rubber content.
• SOLE UNIT: Rubber outsole for increased traction.
• Sizing runs slightly small, we suggest you size up.