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This perennially popular shell from US brand Outdoor Research is much-loved by backpackers and thru-hikers across the pond, and it's easy to see why: it's lightweight, packable and reliably waterproof. And this latest version is also tougher than ever. It's made from Pertex Shield, a 2.5-layer fabric with a 30-denier ripstop nylon face fabric. This also utilises Pertex's Diamond Fuse technology for improved resistance to snags and abrasion. The fabric is a little shiny and crinkly. but that seems a small downside. Waterproofing and breathability are both above average on paper (20,000/20,000 hydrostatic head and MVTR), which translates into solid real-world performance. It's just a shame that the inner of the jacket feels a bit cold and clammy - it's not the nicest to wear against the skin if you've only got a short-sleeved base layer on underneath. The cut is also a little boxy, especially compared to the trimmer-fitting ultralight rivals tested here from Berghaus, Patagonia and Montane. It's also a little light on features, though it does have single draw cord adjustment at the hood and hem, plus an outer chest pocket. so you can clip it to a pack. Cuffs are elasticated, and the main zip is a laminated waterproof design, with a soft chin guard. But overall, for such a lightweight jacket the Helium feels well- built and durable and it is good value too.

Verdict
Simple but effective, this is a great value shell that is both lightweight and packable. The fit and features could be refined though.