Outdoor Research Helium - Women's Review

The Outdoor Research Helium is constructed from 2.5 layer Pertex Shield Diamond Fuse fabric made of 30D ripstop nylon. This impressive outerwear technology delivers a water-resistant and breathable garment that is exceptionally lightweight and compact.

Performance Comparison

Water Resistance

The water resistance of this featherweight fabric is stellar for its weight. The sealed zippers also performed very well in our standing water test, keeping water from penetrating through the front zipper.

However, a few of the top contenders could keep moisture from soaking through for much longer than the Helium in our shower test, and we found that the hood was a little lacking in coverage. The visor was small and flimsy, and the hood hugs the edge of the face, which didn't offer much protection from the rain. While this jacket is not the most water-resistant in an extended deluge, we were impressed with its protection from the elements, considering how we barely noticed it at the bottom of our packs.

Breathability

The membrane of the 2.5-layer construction on the Helium does a formidable job of letting perspiration escape while keeping the rain out. The lightweight fabric doesn't trap a ton of heat. With all the zippers up, this is one of the most breathable rain jackets in our uphill walk test.

In an effort to keep this jacket ultralight, OR omitted pit vents from the design. Despite the quite breathable fabric, the Helium lost points here because of the lack of vents. When overheating, we were forced to unzip the main zipper, which may be fine in a mist or light drizzle, but it's not very practical when it's raining more heavily.

Comfort and Mobility

This rain jacket fits well, is quite comfortable, and allows for a full range of motion. The featherweight fabric is so light that it's easy to forget you're wearing a piece of outerwear. It moved easily with the body and didn't feel restrictive, no matter what activity we used it for. Though on the slimmer side, we could still comfortably layer a smaller synthetic insulated jacket underneath. The inner felt fine against the skin hiking on a warmish windy day, and the cuffs and neck were also comfortable against the skin.

The updated pockets Helium is an improvement for comfort with the addition of hand pockets instead of the one small chest pocket on the original. Having the ability to put hands in pockets when it is cold and rainy increases the comfort of wearing this jacket while out in the elements. The left pocket has a handy key clip for securing keys while wearing the jacket, and this clip doubles as a clip to attach the jacket to a backpack strap, belt loop, or harness when the jacket is stowed. The pockets are roomy enough for a wallet, keys, and a phone.

Weight

This is where the Helium really shines as an ultralight rain jacket. The garment only weighs 6.3 ounces. For comparison, the next lightest jacket weighed 9.2 oz, and the heaviest was 13.3 oz. This puts the Helium at about half the weight of the heavier jackets tested. Though we recognize that 12 oz is still quite light, for those looking to really shave weight, it's hard to beat a 6.3 oz rain jacket —especially one that performs this well across the board.

When stashed in its stow pocket, the Helium compresses into a rectangle measuring 9.5" x 6" x 1.75", the smallest package tested. It's effortless to pack into its pocket, and once packed, the key clip can be used to attach it to any loop to keep it accessible. As far as a lightweight, packable rain jacket, we're super impressed and think the Helium really can't be beat.

Durability

We wondered how this ultra-lightweight fabric would hold up to months of testing in the outdoors. We're known to be a bit hard on our gear, and thus we were somewhat worried we would rip or tear the thin, delicate-feeling material. After putting this jacket through its paces, we were pleasantly surprised by how well it held up. Outdoor Research uses a Pertex Diamond Fuse fabric, which uses diamond-shaped nylon yarn that locks together with the intention of creating a more durable fabric without adding weight, and it seems to be doing the trick.

The components used in this rain jacket are well-made. All of the zippers run smoothly and consistently, and drawcords are durable and easy to use. All structural seams are double-stitched, and seams are seam-sealed to prevent leakage. It is evident that care and time have been taken in the design and manufacturing of this jacket.

Should You Buy the Outdoor Research Helium?

The Helium is a great ultralight jacket, perfect for those looking for an emergency just-in-case layer to stuff into the bottom of their pack. While this is not the most water-resistant jacket tested, we were impressed by how protective it was considering its weight. If weight and space aren't top concerns, you might be seeking something with more bells and whistles than this jacket. This also might not be the jacket for those frequently getting outside in a region with long, heavy rainy seasons. Overall, we recommend the Helium for those looking to keep their packs light so they can go further faster and not let variable weather forecasts get in the way of a good adventure.

What Other Rain Jackets Should You Consider?

For those seeking to stay out for longer in heavy rain, the Outdoor Research Aspire II or Arc'teryx Beta LT offer better protection from the elements. The Mountain Hardwear Stretch Ozonic is another good option for those looking for a lightweight, breathable rain jacket. It includes additional features such as more hood coverage and pit vents.