THE NORTH FACE Women's Thermoball Traction Mule V - Insulated Slip-On

Our review of the Thermoball Traction Mule V finds it best suited to women who want a warm, easy slip-on for base camp, apres-ski downtime, or quick outdoor chores. The single biggest reason to buy is the combination of ThermoBall Eco insulation and a fleece-lined collar that delivers noticeable warmth without a bulky boot, making it ideal for crisp mornings or short trips outside where warmth and convenience matter most.

Key Features

• Slip-in comfort: A collapsible heel and stretchy side panels let you slide the mule on and off quickly while the Oso fleece-lined collar cushions the ankle.
• Water-resistant durability: The ripstop upper is made from 100% recycled polyester with a non-PFC DWR finish to repel light snow and moisture during quick outdoor tasks.
• Superior insulation: ThermoBall Eco insulation, made of 100% recycled polyester, provides consistent warmth even in damp conditions so toes stay toasty.
• Steady traction: A grippy rubber outsole with up to 20% recycled rubber offers reliable footing on slick decks, icy walkways, and cold cabin floors.
• Sustainable construction: Multiple recycled materials reduce waste while maintaining functionality for casual winter wear.

Who It's For

The Thermoball Traction Mule V is aimed at women who need a warm, convenient footwear option around camp, the ski lodge, or for short outdoor errands. It works well for people who prioritize quick on/off access, light-weather resistance, and cushioned warmth over long-distance walking or heavy-duty winter hiking.

Those who should look elsewhere include women who need a fully waterproof, lace-up winter boot for extended time in deep snow or steep, technical terrain, or anyone who requires a very precise fit for long hikes, since fit opinions vary and some users report a snug feel.

Pros & Cons

Pros

• Warm and comfortable thanks to ThermoBall Eco insulation and a fleece-lined collar.
• Easy to slip on with a collapsible heel and stretchy side panels for quick wear.
• Durable ripstop upper and DWR finish resist light moisture and snow.
• Grippy outsole with recycled rubber provides confident traction on slick surfaces.

Cons

• Fit can be inconsistent; some wearers find them snug without socks and others find them perfect.
• Not designed as a fully waterproof or heavy-duty hiking boot for deep snow or extended outdoor work.

Specifications

Brand	The North Face
Model	Thermoball Traction Mule V
Upper	Ripstop, 100% recycled polyester with non-PFC DWR
Insulation	ThermoBall Eco, 100% recycled polyester
Lining	Oso fleece-lined collar
Outsole	Rubber with up to 20% recycled rubber, high-traction tread
Style	Slip-on mule with collapsible heel and stretchy side panels

Our Verdict

The Thermoball Traction Mule V is a practical, well-made winter slip-on for women who want cushioned warmth and easy on/off convenience around camp or for quick outdoor chores. It offers good value if you prioritize insulation, light moisture resistance, and traction, but those needing a precise fit or full waterproof protection should consider alternative boots.

Frequently Asked Questions

Are these fully waterproof?
They are water-resistant with a DWR finish and repel light snow, but they are not fully waterproof for deep slush or prolonged wet exposure.

Can I wear them without socks?
Some customers do and find them comfortable, but fit varies and others report a snug feel without socks, so trying your usual sock combination is recommended.

Do they provide good traction on ice?
The outsole offers solid traction on slick decks and icy walkways, but it is not a winter crampon replacement for very icy or technical conditions.