OutdoorGearLab

The Arc'teryx Cerium SL Hoody is our favorite ultralight down jacket built for packing light and going fast. It has all the necessary features that make it a technically capable jacket while omitting extra bells and whistles that would add weight, bulk, and complexity. The incredible compressibility and lightweight nature really made it stand out from the others in our review. It's the ideal jacket to clip to your harness and forget about until the temps start dropping. For the same reasons, this is an excellent jacket for commuters who want a warm jacket they can easily stuff into a small pack while getting on and off public transit. It has a classic Arc'teryx fit that makes it appropriate for the mountains and looks good while out on the town. The hood and hem both have adjustable drawcords to lock out the cold, which is unique for such a lightweight jacket.
While the Cerium SL is a nearly perfect ultralight down layer, you should be aware of a couple of things. First, the thin ripstop nylon shell is tear-resistant, but that's a relative term, and when compared to the heavier-weight fabrics used in many of the other options, this fabric just won't hold up as well. We also know from experience that even with careful use, the thin zipper used on this jacket can wear out before the rest of the jacket will. All in all, this jacket is ideal for those looking for a high-quality option that prioritizes weight and compressibility.  

The ultralight Arc'teryx Cerium SL Hoody has features that make it technically capable while omitting extra bells and whistles that would add weight, bulk, and complexity. It was built for packing light and going fast. The incredible compressibility and light weight made it stand out. It's the ideal jacket to clip to your harness, stash in your pack, and forget about until the temps drop. Whether hiking or commuting, this jacket's lightweight compressibility and classic Arc'teryx fit lets it transition well from the mountains to town. It's an ideal all-around piece.
The Cerium SL's lightness comes at a bit of cost. When compared to heavier jackets, the thin ripstop nylon shell can only withstand marginal tears. Thus, it suffers from durability issues and the thin zippers wear quickly. On a positive note, the adjustable drawcords in the hood and hem lock out the cold. Most light jackets lack these features. As a high-quality jacket that prioritizes weight and compressibility, Arc'teryx delivers.  
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