Arc'teryx Motus Balaclava
The Arc'teryx Motus Balaclava (Model #25843) weighs 45 grams and is made from Phasic AR II polyester for full-face coverage during cold-weather trail running and ski touring. The double-knit construction delivers thermal performance and moisture management, while the contoured one-piece design eliminates seams that can irritate. Manufactured at the Youngone Nam Dinh facility in Vietnam. Fair Trade Certified production reflects Arc'teryx's commitment to ethical manufacturing. I bought this for trail running, but the minimal insulation limits my use to shoulder-season activities rather than deep winter.
Phasic AR II Fabric
Phasic AR II fabric combines engineered polyester fibers in a double-knit construction that balances warmth with breathability. The peached finish creates a fuzzy interior that feels soft against skin without causing overheating during high-output activities. Arc'teryx lists the technical features as moisture-wicking, breathable, and quick-drying, with stretchy fabric that provides freedom of movement. The moisture-wicking properties move sweat away from the surface, preventing the clammy feeling that develops with inferior fabrics.
Silvadur antimicrobial treatment inhibits odor-causing bacteria, allowing extended use between washes. The synthetic construction dries quickly after exposure to sweat or precipitation, maintaining comfort throughout variable conditions.
How Does the Arc'teryx Motus Balaclava Fit?
Sizing comes in S-M and L-XL rather than one-size-fits-all, which is unusual for Arc'teryx balaclavas. The stretch construction accommodates various head shapes within each size range, though the fit runs small compared to other Arc'teryx headwear. I sized up to achieve comfortable coverage without pressure on my forehead and temples. The contoured shaping follows head contours rather than relying solely on stretch, creating consistent coverage without gaps.
Flatlock seams throughout eliminate the raised ridges that cause chafing during extended wear. The construction quality matches Arc'teryx standards, with clean finishing and durable stitching that survives repeated washing and use.
Light Warmth for 30-45°F
The lightweight Phasic construction provides light warmth suitable for temperatures between 30°F and 45°F during high-output activities. Trail running, ski touring, and snowshoe trekking work well with this balaclava because the body heat generated compensates for the minimal insulation. Static activities like chairlift riding in cold conditions call for heavier options.
For true cold-weather skiing below 25°F, the Rho Balaclava or Rho AR Balaclava provides substantially more insulation. The Motus targets runners and tourers who generate significant body heat and need breathability over maximum warmth.
Fits Under Helmets Without Issues
The low-profile design fits under ski, climbing, and cycling helmets without creating pressure points or compromising fit. At 45 grams, this adds minimal bulk to helmet-compatible headwear. The smooth exterior allows helmets to slide on and off without catching.
The thin construction actually makes this better suited for under-helmet use than thicker alternatives, which can create fit issues. I've worn this under various helmets without needing to adjust sizing or padding.
Enigma Heather and Black
Arc'teryx offered the Motus Balaclava in Enigma Heather and Black. The Enigma Heather is a muted grey that pairs with most outerwear, while the Black is the standard go-to. Both are discontinued. Resale prices hover around $30-50 on eBay and Poshmark. Check seam integrity around the face opening and look for pilling on the interior peached surface before buying secondhand.
Arc'teryx Motus Balaclava vs. Norvan and Rho
The Motus sits at the lightweight end of Arc'teryx's balaclava spectrum, prioritizing breathability and moisture management over insulation. The Norvan Balaclava, with its open-top design, targets similar high-output activities and features merino wool construction. The Rho and Rho AR provide more warmth for moderate-to-low output activities.
Choose the Motus for trail running, ski touring, or other pursuits where overheating poses a greater risk than cold. The $40 price placed this accessibly among Arc'teryx headwear. Check current availability at Arc'teryx. For a similar lightweight synthetic option, the Black Diamond Coefficient Balaclava uses Polartec Power Grid fleece at a comparable weight.