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Size chart

Sizing notes

All sizing is based on body measurements.


Rated 5 out of 5 by from $58 shipped was a big time steal for me! I got the red one this time at a super garage price. No brainer since the blue/dusk one is so excellent. Its light, durable, looks good, and waterproof while letting me breath out the pits and sides where less rain tends to get in anyway. Great thinking on OR's part with this design. I'll get another even if I don't need another rain jacket if its available in another color at this price, too. I'm hooked. For sizing, I'm 6' and 200 lbs and the large fits fine but I prefer the xl just in case I want to layer up. I'm giving away my gore tex jacket now since these are so light and do the job of repelling water just as well. Can't beat it.
Date published: 2017-10-18
Rated 5 out of 5 by from Excellent Lightweight Rain Jacket OR's Helium HD finally topped my list after I searched for over a year for the right lightweight rain jacket to use year around, and particularly for those late summer thunderstorms when you're hiking in 100F one minute and looking for shelter the next. It is exceptionally lightweight, breathable, pack-able, and comfortable. It packs so small and light that I'll often clip it to my shorts and forget it is there. It disappears into a pack's side bottle pocket. The fit is spot on for me. I'm 6'3" and currently (unfortunately) 230lbs, 36" waist, athletic with a little extra. The XL fits how I prefer- feeling tailored but not fitted, falling just below the hips with sleeves coming mid-finger in a way that keeps other layers nice and dry. I like how the hood has one back cinch that actually draws it around my narrow head and whose cord rests above my ears. It's easily adjustable to fit snugly over a cap or climbing helmet (which I had no problem fitting into the hood. The wire brim crams down well and always returns to form when unpacked. Pit zips help to keep the heat and moisture out as well as they can. I like having the two zippers per vent to allow fully open or managed venting as necessary. In the rain, water beads and is easily shaken off. During casual use, nary a drop has been let in when the hatches are battened. I have to remember that this is not a shell and I shouldn't expect it to be impenetrable. Climbing and on belay for four hours during steady mist and light rain, water stayed out and my shirt never got wet. On the hike down, I had a pack and rope tied around my shoulders. At some point, the hood (over a hat), shoulders, and spots on the chest accumulated water on the inside. I don't know if it was from the fabric wetting out or from my own sweat being unable to evaporate in the humid and soaking conditions. Either way, it performed much better than any other lightweight rain jacket ever has. I tend to run hot and sweat easily, making most jackets pointless after a few minutes of active use. Even though I could feel quite a bit of moisture with my hands, my shirt and hat never wetted out oddly enough. When taken off under cover, the jacket dried quickly. I'm comfortable knowing this jacket will keep me dry long enough to get a few more miles in and set up shelter before I'm in trouble. I haven't tested the durability. The fabric is definitely thin, but it doesn't cause the anxiety of thin fabrics I've experienced on down products. It's handled brushes with brush, but I try not to scrape it on anything sharp. A little fabric side note is that it's loud, but not deafening and crinkly like some other jackets. Overall, the Helium HD checked every box I needed I would recommend to others. The black and blue look sharp and I don't mind wearing it wherever I go.
Date published: 2016-04-19
Rated 5 out of 5 by from My new go to shell Last weekend we got a few heavy doses of Cascade showers during our hike. Wind blown rain while toiled up a trail so steep I could reach out and touch it. I got to the top and was amazed to be dry inside my Helium HD. My previous shells were waterproof but held in the sweat from the workout like a steamy tamale. Not the Helium HD! It really delivers on waterproof and breathable. It has all adjustments and features of much heavier shells. The hood fits great. All the seams and zippers work well. OR put it all into such a light shell. This is in my pack for every hike and xc ski.!
Date published: 2014-09-05
Rated 5 out of 5 by from Without a doubt my new favorite jacket It my new Fav. Though I haven't had a chance to test for a season, this has been a great early fall jacket. I have worn in torrential downpoor of rain/hail while fly fishing (lasted about 45 min). Worn in the stands of a soccer game during continuous rain (2 hour). Water only started seeping through the membrane at the end of the soccer game, and only minimal. Pit zips are fantastic and what cased my to get it. Extremely lightweight and packable. Thin enough for hiking in warm weather but need layers for anything under 50 deg.
Date published: 2017-11-19
Rated 5 out of 5 by from Blown Away! I have used rain jackets from Marmot for years and I decided to get a new jacket. My first thought was the Super Mica from Marmot, but I decided to give this new product a try. I saw the review of the Helium II on OutdoorGearLab and the only thing I wanted was a jacket with more features. The Helium HD is that jacket. It is super light, comfy, breathable, and performs better than any rain jacket I have ever used. I had to guess on ordering the correct size because I am normally between a medium and a large. I ordered the large and it fit perfectly. OR has won me over and I can't wait to get more of their products!
Date published: 2014-03-21
Rated 4 out of 5 by from Almost perfect Let me compare this with the Arcteryx Alpha SL parka that I own, and the Arcteryx Squamish Hoody that I also own, both of which are hooded jackets/parkas. The Alpha SL (superlight) is Arcteryx's ultralight waterproof/breathable parka. It has all the extras you expect in a high-end parka (pit zips, generous hood that has a pull-back cord as well as a drawstring around the face, handwarmer pockets, waist drawstring). It weighs about a pound, and rolls up (I like to roll up my jackets and cinch them with 3/4" flat black webbing with a Fastex buckle) to about 4"X8". I've been very happy with it, but I'm always looking for a lighter shell parka. And the Helium HD has all the same features, yet weighs a few ounces less, and rolls up to 4"x5", considerably smaller. The Outdoor Research Helium HD's material Pertex Shield + has a slicker finish (slippery) but drapes much better than the Arcteryx; it feels more like a windshirt than a waterproof/breathable jacket. And, I just got it before going on a week and a half spring trip to that wild and natural area, Walt Disney World. However, WDW during a rainy week was actually a pretty good test. There were cloudbursts... and the Helium HD kept me dry. Not only that, I wore it on the Kali River Rapids ride, and at least where it covered me I was totally dry. And, even with the pit zips closed (and I insist on pit zips as I sweat so much) and partially wet, it breathed about twice as well as the Arcteryx Alpha SL, and about half as well as the Acteryx Squamish hoody (which isn't waterproof, and doesn't have pit zips, but weighs and bulks half of the Alpha SL). I'm sold on the Pertex Shield plus material. The only issue I have with the Helium is the tailoring. I wear 32x32 pants, and have a 39" chest. A medium Arcteryx Squamish or Alpha fits me fine with room for a few layers underneath. The medium Helium HD, though, was tight across my shoulders even with a single thin layer; I had to exchange it for a large. The large extends down to my crotch which is not a bad thing for a shell parka, and the sleeves are a bit long but then that's OK as I can leave them open and dangling for both ventilation and to keep my hands dry. But the velcro fastening at the wrist won't stay closed around my wrists; it's in the wrong place for someone with smaller bones like me. I have to move the velcro about an inch so I can close the wrists both with no layers on my wrists and with several. But overall, there's a lot to like about this jacket.
Date published: 2016-04-05
Rated 5 out of 5 by from Good so far I like this rain jacket so far, but have only used it a couple of weeks in light rain. I think REI should prompt us for reviews months after we bought the product, not so soon when we have had little experience using it (don't things usually work as they should when brand new?). The best feature (other than repelling rain) is that if packs into a lightweight, small size, so it's easy to bring along in case of rain or wind. I first bought a large, but that was too small, so went for the XL (which is unusual for me) and it fit fine, so I think their sizing is a bit off.
Date published: 2017-04-16
Rated 3 out of 5 by from Great Except for the Cuffs I waited for this shell with great anticipation while it was on back order. I liked the Helium II jacket except pit zips are a must for me, as I live in Texas and need an all season rain jacket. I don't really disagree with the prior two reviews, but have to pan it for the cuffs on the sleeves. I know they can put elastic in the cuffs, since they did in the Helium II. That means that every time you put it on or take it off, you have to open the Velcro tabs. A little elastic would allow you to set it and forget it and be able to slip it over your hands. Next, those cuffs are cut and the Velcro is located to fit only a huge wrist. I cannot snug the cuffs on my wrists, as a tight fit for me overlaps the Velcro by over an inch. I tighten it as much as I can yet still have enough Velcro surface contact to keep it connected and the sleeves still slip down my hands and I have little tabs of Velcro sticking out, which does not look good. For example, if you wash your hands wearing this jacket, you are going to soak the cuffs. I don't think you could wear this and cook. I want to like this jacket because it is so light and seems to do so well at keeping the water out, but every time I put it on and have to fuss with the cuffs, or try to wash my hands without soaking it, I get torqued. Please redesign this parka with some elastic and reasonably located Velcro. It may well then become the perfect lightweight rain parka.
Date published: 2016-05-28
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Questions & Answers

When looking on Outdoor Research's website, it shows this jacket, the Outdoor Research Helium HD in an XXL size in the Black/Hydro color only.  Does REI sell the XXL size?  It's not listed as an option for purchase and I'd like to order it.

Asked by: BradyM
Unfortunately, REI does not carry the Helium HD Rain Jacket in size XXL.
Answered by: REIservice
Date published: 2017-03-07
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