The North Face x SKIMS Mule V: Sizing and Fit Guide
By Kith – Homepage | Published: 2026-10-30
Category: Product Reviews
Learn how The North Face x SKIMS Thermoball Traction Mule V fits, whether it runs true to size, and get clear decision rules for ordering your size.
Quick Answer
The North Face x SKIMS Thermoball Traction Mule V generally fits true to size, but the collapsible heel and cozy insulation mean you may prefer a half size up if you plan to wear thicker socks or have wider feet.
Why the collapsible heel changes fit
The mule features a collapsible heel with elastic side panels, so you can wear it as a slip-on or step on the back like a clog. This design can make the shoe feel slightly looser when worn as a mule, especially if you have narrow heels.
If you prefer a snug, secure fit, consider sizing down half a size when wearing it as a slip-on. But if you plan to use the heel up for a more traditional fit, your regular size should work well.
Insulation and sock thickness
The Thermoball™ recycled polyester insulation adds warmth and a bit of plushness inside the shoe. This can make the fit feel snugger than a typical mule, especially if you wear thick socks.
If you're between sizes or plan to wear these with heavy winter socks, going up half a size gives you extra room without feeling too loose.
Sizing Decision Rules
- Narrow feet: Order your true size. The elastic side panels and collapsible heel provide a secure fit without extra room.
- Wide feet or high instep: Go up half a size. The ripstop upper doesn't stretch much, and the insulation can make the fit feel tight across the midfoot. If you're between sizes, choose the larger size for comfort.
- Wearing thick socks: Size up half a size. The insulation plus thick socks can make your regular size feel cramped. If you plan to wear these indoors without socks, your true size is fine.
- Wearing as a slip-on with heel down: Consider sizing down half a size if you have narrow heels, as the collapsible heel can make the shoe feel loose at the back. If you prefer a snug fit, try your regular size first and adjust if needed.
Product Facts
- The North Face x SKIMS WMNS Thermoball Traction Mule V - Kyanite: The upper is made from 100% recycled P.E.T. ripstop, with an Oso fleece collar lining and Thermoball™ recycled polyester insulation. The fleece lining and insulation add warmth and a cozy feel, which can make the shoe fit snugger than expected, so consider sock thickness when choosing your size.
The North Face x SKIMS WMNS Thermoball Traction Mule V - Kyanite
Who Should Choose This Mule
Best for
- People looking for a warm, insulated house shoe or casual slip-on
- Those who like a cozy, plush fit and don't mind a slightly snug feel
Not for
- People with very wide feet who need a roomy toe box
- Those who prefer a completely rigid, structured shoe without a collapsible heel
