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Climb Ski Hiking/Trekking

CoEfficient Hoody



Built to keep you warm on Chamonix’s technical couloirs and the endless ice and alpine routes of the Canadian Rockies, the highly breathable CoEfficient Hoody is a lightweight alpine layer with a hood that fits under a helmet.
Item# APJSC4810XLG1

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Combining lightweight warmth, high breathability and super-quick dry time, the Black Diamond CoEfficient Hoody is the ultimate thermal midlayer for fast-and-light alpine pursuits. With an optimized Polartec® PowerDry® High Efficiency fleece fabric unique to Black Diamond, the CoEfficient insulates when you're stopped at the belay and regulates body temperature when you're out on the sharp end. A scuba-style, under-the helmet hood lets you ditch the beanie, and a single chest pocket keeps small essentials at the ready.

  • Scuba-style, under-the-helmet hood
  • Chamois-lined neck
  • Zippered chest pocket
  • Stretch cuffs
Apparel Warranty

Apparel Warranty

We trust what we make because we use what we make. If for any reason, you’re not 100% satisfied with your Black Diamond apparel, we’ll repair, replace or refund it. No charge. No fine print. No debate. Guaranteed.


Tech Specs

Materials :   Polartec® PowerDry® High Efficiency fleece (207 g/m2, 88% polyester, 12% elastane)
Weight :   345 g (12.2 oz)

Recommended Use


Rated 4.8 out of 5 by 20 reviewers.
Rated 5 out of 5 by I have worn it everyday since I bought it! Maybe I was missing a full zip sweater in my quiver? I love the fabric and the fit. Being a male i do search for hand pockets but I think they would actually mess up the fit. The hood is sweet. Probably my only dislike is the size of the logo --- I would like it much smaller ;-) April 5, 2014
Rated 5 out of 5 by Great hoody Great fit and excellent craftsmanship. I'm 5'10" & 190 and the large fit great. March 25, 2014
Rated 5 out of 5 by Love this thing! This is a great layering piece. the hood is snug fitting and you can still fasten the helmets chin strap with no problem. Not so with some of the others. Very warm for it's weight,,you can wear it on the approach and not expect to be soaked in sweat since it breaths well in this role. At the base of the climb throw a shell over it and it warms up nicely. Nice! March 4, 2014
Rated 5 out of 5 by It Does Exactly What it is suppose to Do! I wanted a low profile mid layer that could provide that delicate balance of warmth and breathability The Coefficient Hoody delivered that and more with features like spandex cuffs and helmet friendly hood. The sizing was perfect just how a mid layer should fit. February 19, 2014
Rated 5 out of 5 by The go-to piece. Super wicking, low bulk, perfect for high effort, cold days. January 20, 2014
Rated 5 out of 5 by Lots to like. Really like the Coefficient Hoody. I am 6'2", 160 lbs. The med. fits very well with space for an additional thin layer underneath. Arms are a good length and I like the cuffs. It is cut to just over the hips which I like. You can tuck it in your ski pants and keep your back warm. No low pockets to worry about or interfere with a climbing harness. Just one chest pocket, keeps my Iphone warm. Nice smooth outer, definitely light weight. No wind stopping properties. I wish they would make this in a mid-weight version as well. January 15, 2014
Rated 5 out of 5 by Can't take it off! So soft, light, warm and snazzy that I wear it ALL the time. Great layering piece or perfect over a t-shirt for milder conditions. The hood is a bonus when conditions merit that extra protection for neck and ears. Washing it is difficult since I can't wear it when it's wet... January 11, 2014
Rated 4 out of 5 by Great Piece! very light, no extraneous frills. could use a bit more zipper pull coverage when fully zipped up. Cuffs are great. January 10, 2014
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