Winter Trail Running Gear Test: Five Products for Cold-Weather Running

Introduction

Winter trail running demands gear that handles cold temperatures, variable terrain, and moisture. This test covers five products that address the core challenges of running in winter conditions: waterproof protection, thermal layering, audio for long runs, and fueling for extended efforts.

On Cloudsurfer Trail 2 Waterproof

The On Cloudsurfer Trail 2 Waterproof brings Gore-Tex protection to a lightweight trail shoe designed for mixed terrain. The waterproof upper adds a liner layer that increases weight to 11.0 ounces (312 grams) in a US 10, compared to 10.5 ounces in the non-waterproof version. The shoe features On’s standard Helion foam midsole with a 39mm heel stack and 8mm drop, paired with a MissionGrip outsole that uses shallow 1.5mm lugs.

The waterproof construction makes the upper noticeably stiffer than the regular trail version. A lace lock helps secure the heel, which is useful given the reduced flex. The tongue is well-padded and tall, so even with the lace lock positioned high, there is no pressure across the top of the foot. Sizing accommodates the waterproof liner without requiring a full size increase; a half size up from your regular On size remains the typical recommendation.

The ride emphasizes a rounded geometry that encourages a smooth rocker motion through the middle of the foot, rather than a traditional heel-to-toe landing. The Helion foam is moderate in firmness, supporting this geometry without feeling overly soft or unstable. The shallow lugs handle light trails, gravel paths, and mixed terrain well, though they are not designed for technical mountain running.

In a waterproof test with water poured above the ankle, the shoe remained completely dry inside, with only minor moisture around the ankle collar. The waterproof performance is reliable, though the primary use case is winter running in cold, dry conditions rather than water crossings.

CEP Core Run Merino Base Layer and Quarter-Zip Shirt

CEP’s Core Run line combines merino wool with engineered fabrics for winter running. The base layer is 80% merino wool and provides genuine thermal retention even when damp from sweat. Unlike synthetic fabrics that feel clammy when wet, merino maintains its insulating properties, making it effective for runs that start cold and warm up as effort increases.

The quarter-zip shirt is designed as a mid-layer or standalone outer layer. It is wind-resistant but not fully windproof, so moderate to strong wind will pass through the fabric. The standout feature is a tall stand-up collar that sits high on the neck, providing extra coverage compared to typical running quarter-zips with mock necks. The collar height is intentional and listed as a product feature, so it is worth noting if you prefer lower necklines.

The shirt is breathable enough to serve as an outer layer on its own in calm conditions, though pairing it with a thin shell provides better wind protection. The fabric has a subtle waffle design that traps air for additional warmth. Sizing is true to size, and CEP provides detailed model measurements on their website to help with fit selection. Both pieces fit accurately when sized according to the model’s dimensions.

For runs in temperatures around 30 degrees Fahrenheit with light wind, the base layer and quarter-zip combination provides sufficient warmth without overheating during sustained effort. The merino base layer’s moisture-management properties make it especially valuable for longer runs where sweat accumulation is inevitable.

Soundpeats Clip1 Earbuds

The Soundpeats Clip1 uses a clip-style design that wraps around the back of the ear rather than inserting deeply into the ear canal. The speaker section sits in the ear, connected by a nickel-titanium extension that clips securely around the ear. This design is comfortable for extended wear and does not require silicone ear tips, making it an open-ear earbud that allows ambient sound to pass through.

The earbuds are very light at five grams each and include automatic left-right ear detection, which eliminates the need to manually identify which earbud goes in which ear. The charging case has a clean design with easy-slot compartments for each earbud. Audio quality is strong, with support for Dolby Audio 3D Sound and LDAC high-resolution wireless audio. Battery life is reported at 30 hours of playback time with the case.

The clip design holds the earbuds securely enough that they remain unnoticed during runs, even when not actively listening. The open-ear design means you hear everything around you, including traffic and trail hazards, which is valuable for outdoor running safety. The earbuds are light enough that they do not create fatigue during long runs, and the secure fit means no adjustment is needed mid-run.

Pricing is approximately $55 on Amazon, with a 10% discount code available from the manufacturer’s website. At either price point, the Clip1 offers strong value for runners who prefer clip-style earbuds over traditional in-ear designs.

Tailwind Endurance Fuel and Recovery Mix

Tailwind’s Endurance Fuel comes in 50-gram carbohydrate packets with 630 milligrams of sodium per packet. The recommended mix is one packet in 20 to 24 ounces of water, which delivers approximately 1,000 milligrams of sodium per liter. This sodium level aligns with average sweat rates, though individual variation is significant. Runners who sweat less salt may find this amount high, while heavier salters may want to increase the dose.

The 50-gram carbohydrate amount is moderate and works well when varied with solid foods or gels during longer efforts. Tailwind also offers a Rapid Hydration mix with 10 grams of carbs and 320 milligrams of sodium for lighter hydration needs between runs or post-run recovery.

The Recovery Mix contains 20 grams of protein, 34 grams of carbs, and 500 milligrams of sodium. The protein sources are fava bean isolate and brown rice protein, making it suitable for runners avoiding whey. The mix provides a complete post-run recovery option with both macronutrients and electrolytes in one product.

Tailwind’s Endurance Fuel comes in multiple flavors including Watermelon, Mandarin, and Raspberry. The Recovery Mix is available in Chocolate and Vanilla. Both products mix easily and provide practical options for fueling during training and recovery.

The UltrAspire Zygos 6 Pack

The UltrAspire Zygos 6 is a lightweight trail running pack designed for carrying hydration and fuel on longer runs. It pairs well with the other gear tested here, particularly when running efforts extend beyond two hours where external fuel and hydration become necessary.

Conclusion

Winter trail running requires layering, protection, and reliable fueling. The On Cloudsurfer Trail 2 Waterproof handles moisture and cold while remaining light enough for moderate trails. CEP’s merino base layer and quarter-zip shirt provide genuine thermal management without bulk. The Soundpeats Clip1 earbuds offer secure, comfortable audio for long runs. Tailwind’s fuel and recovery products support sustained effort and post-run recovery. Together, these products address the practical demands of running in cold conditions.