Black Diamond Men's Coefficient Hoody-TUNDRA

The Black Diamond Men's Coefficient Hoody in Tundra is built as a technical midlayer for anything from ski tours to alpine ascents. It uses Polartec Power Grid fleece with a gridded interior that boosts wicking performance and adds breathability, so moisture moves away from skin instead of soaking into the fabric during high-output climbs and long approaches. The grid construction also improves the warmth to weight ratio, giving you real insulation without extra bulk under a shell.

An under-the-helmet hood and a full-length zipper let you dial in temperature on the move. Pull the zipper down at the base of a climb and zip back up when the wind picks up on a ridge line, all without stopping to dig through a pack.

Lightweight stretch cuffs with integrated thumb loops seal out cold air at the wrist and keep sleeves in place under gloves. A slim cut helps the Tundra Coefficient Hoody sit close to the body, so it layers cleanly under a shell jacket and still packs down small enough to stash away once the sun comes out.

The zip chest pocket gives you a secure spot for a phone, snack, or map without adding weight to the hand pockets. Material composition is 51% polyester, 36% nylon, and 13% elastane in a 180 gsm knit, and the fleece is bluesign approved, meaning the fabric was produced under strict environmental and safety standards.

At 582 grams and offered in sizes S through XL, this hoody suits men who need a midlayer that performs on ski tours, alpine routes, and cold-weather job sites alike. Black Diamond designed the Coefficient Hoody to work as hard as the terrain demands, and the Tundra colorway pairs easily with technical outerwear or everyday layers for teams that spend real time outdoors.