Tried and Tested: Arc’teryx Cerium SL jacket

The Arc’teryx Cerium SL review: This Jacket remains one of those ‘you have to try it to believe it’ pieces of kit. On paper, it seems impossible. How can a jacket offering 850-fill-power warmth weigh just 215g – barely more than an apple?

Evolution of the Arc’teryx Cerium SL

Since its original launch, the Cerium SL has evolved, yet it still embodies Arc’teryx’s signature blend of high-performance design and cutting-edge materials. This latest iteration retains its ultralight ethos while refining durability and comfort. The key to its impressive weight-to-warmth ratio lies in the strategic use of down and synthetic insulation combined with an ultra-light Arato™ 7 nylon shell.

Advanced Insulation Technology

Like its predecessors, the Cerium SL features Down Composite Mapping™, which places Coreloft™ synthetic insulation in areas prone to moisture accumulation, such as the cuffs, shoulders, and underarms. The rest of the jacket is filled with premium 850-fill-power grey goose down, providing exceptional loft and warmth. This construction ensures that even in damp conditions, the jacket continues to perform.

Minimalist Design with Maximum Functionality

The designers at Arc’teryx have also fine-tuned the fit, removed excess bulk, and kept the features minimal to maintain its lightweight appeal. It includes two zippered hand pockets, elasticated cuffs and hem, and a compressible design that allows it to pack down into a tiny space. The result? A jacket that feels almost weightless yet delivers serious warmth when you need it.

Durability Without Compromise

Despite its delicate appearance, the Cerium SL is surprisingly tough. The Arato™ 7 fabric is made of fine filaments woven into a dense structure, making it impressively resilient for its weight. While it isn’t designed for direct exposure to heavy rain, it layers effortlessly under a shell for added protection against the elements.

Final Verdict: Should You Buy the Arc’teryx Cerium SL?

VERDICT: One of the lightest and best-performing down jackets we’ve tested – Arc’teryx continues to set the bar for technical insulation with the Cerium SL. Whether you’re stuffing it into your pack for ski touring or layering it for cold-weather adventures, this is a jacket that delivers warmth without the weight.