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Retailers' Descriptions

Here's what other sites are saying:

Arc'teryx Men's Apparel Clothing Cerium SL Vest - Men's Black Large 327813. Intended as a very light and minimal midlayer in cool dry conditions.

- CampSaver.com refers to the men's version

As light and compressible as functionally possible the Cerium SL down vest weighs a scant 120g (4.2 oz) but delivers exceptional warmth for its weight. The 850 fill power goose down's warmth to weight ratio is outstanding and the tear-resistant wind resistant Arato(TM) 7 nylon shell is exceedingly lightweight. It primarily functions as a mid layer but its efficient warmth and packability make it an effective standalone for rest breaks evenings at camp or emergency bivvies. Sizes: S M L XL XXLWeight: 125 g / 4.4 ozFit: Trim fit Hip Length Centre back length: 69 cm / 27.13 inSizing Chart: Men's Top Sizing ChartActivity: All RoundModel: 20981

- Massey's Outfitters refers to the men's version

The Arc'teryx Men's Cerium SL Vest is a streamlined, lightweight core-warming layer designed for backcountry adventures. Lofty 850-fill goose down fills the tight baffles around the body to trap warmth where you need it most, and synthetic Insulation is placed on the top of the shoulders to retain warmth if exposed to moisture. With the included stuff sack, this thing compresses into the palm of your hand and takes up little space in your pack. Features of the Arcteryx Men's Cerium SL Vest Super lightweight Arato 7 face fabric with DWR finish repels moisture Down Composite Mapping strategically places both down and synthetic Insulation Lightweight, minimal front and chest pocket zippers, 1L stuff sack included Collar height provides warmth while layering easily Adjustable hem drawcord seals out cold

- Moosejaw refers to the men's version

The Cerium SL down vest weighs a scant 4.2 oz., but delivers exceptional warmth for its weight thanks to ultra-lofty 850 fill power European grey goose down insulation.

- REI refers to the men's version

The Arc'teryx Cerium series is composed of streamlined down insulators, and the SL moniker stands for super light, so you can probably figure out for yourself what the Cerium SL Men's Vest is all about. With a face fabric made of wind-blocking Arato 7 polyester and coated with a water-repellent DWR finish, the Cerium SL is as functional a fall outer layer as it is a winter midlayer and is filled with a strategic combination of 850-fill goose down and Coreloft synthetic insulation to keep you warm, reduce weight, and provide all-weather functionality. The down is concentrated around your core to provide increased warmth, and the Coreloft is located in areas that are more prone to getting wet, so you don't lose insulating power if you get caught in a quick storm. Coreloft isn't as light or packable as down, but the Cerium SL still weighs a miraculous 4. 1oz and stuffs easily into the integrated stuff sack, so it will never slow you down or feel bulky. An elasticized rear hem helps keep snow and drafts from invading your inner layers, and the low-profile collar is finished with a soft chin guard to protect your skin when you burrow down against the cold.

- Backcountry.com refers to the men's version