Black Diamond Coefficient Headband

• Soft Polartec fleece keeps your ears and head warm without feeling heavy or overheating once you're working hard
• A genuinely lightweight build means you can wear it all run without it feeling like extra gear
• Fits comfortably under a hood or helmet, so it layers easily with the rest of your cold weather kit
• Barely there feel means it stays put and out of mind, even on your longest winter sessions

• Weight: 17g
• Materials: Polartec Light Weight Power Grid Fleece, 90% polyester, 10% elastane, 119gsm
• One size fits all
• Reflective logo detailing

• Cold weather running, early starts, and evening sessions where you need warmth without bulk
• Layering under a hood, hat, or helmet for extra cold days
• Anyone who runs hot but still needs their ears covered in winter
• Less suited to hot weather running where breathability and sun protection matter more than warmth. The Black Diamond Distance LT Hat is a better pick from our range there, with mesh side panels built to keep you cool on high output, warm weather days

The Coefficient LT is a simple solution to a common problem, cold ears on a winter run without wanting to commit to a full beanie. It's light enough that you forget you're wearing it, but warm enough to make a real difference on frosty mornings. It's an easy, low cost addition for anyone building out their cold weather running kit.