Great and very light jacket for all around 3 season use. very light, small, totally waterproof. Perfect emergency piece and doubles as a windbreaker. Trim fit but will work over a light fleece or insulated jacket.
This was a great choice for my JMT in a week through hike where weight was key.

First time out on a run with the OR Helium II and I am seriously impressed. So light and so quiet for a waterproof that I had to check to make sure it hadn't leaked (and it hadn't). Wicked the moisture away so well that I didn't feel hot and bothered one bit - and it's August in New Jersey! It's beautifully spartan but has a zippered pocket for all that I need on the trail, tight cuff seals, ample room and perfect drawcord adjustments. And, soooo small in its stuffpocket. Pretty near design perfection. I'm always leery of corporate mottos but 'designed by adventure' rings true for this company. This jacket is clearly designed by folks that walk the walk (or run the run. in this case).

I purchased the Helium jacket specifically for having with me while doing rope rescue work. The first day I brought it with me the jacket proved it's worth. We started out with a sunny day which quickly turned ugly with cold temps and even colder rain. I pulled out my Helium Jacket put it over my fleece and stayed dry and warm all day long while on rope. Great Product OR!!!

A super lightweight (190 gr. in M) and breathable water repellent jacket with minium packsize. Folds easily into integrated pocket with sling, great to have it in your pack just in case.Mushroom/red is a the color to go with and general fit is very well. Nice and simple jacket with no unnecessary pockets and gimmicks, it just does what it says at the box.
It would be even better if it has a small strip out of a better breathing material under the armpits ( still no need for pit zips) and the brim of the hood could be a bit stiffer and better to shape around my face.

The Helium is a sleeper jacket. It seems light weight when you first see it and when stuffed into it's pouch, it looks really small. Don't be fooled by this light weight-ed-ness! This jacket performs in a league well above it's weight class. The simple design is easy to battened down and yet, it provides ample motion to hike or to swing a paddle all day. The hood adjustment works well, providing good protection from a hard slanting rain, while maintaining optimum peripheral view. The Helium is a great jacket! The same qualities that make it perfect for outdoor enthusiasts, comfort,light weight and pack-ability, also make it an ideal jacket for any urban adventurer facing a rainy day.

This jacket is so dialed in and stripped down to the essentials for staying dry. Super lightweight no other brand even comes close. Chest pocket and internal stuff pocket are all you need. I take this every time I travel whether for urban or outdoor adventures. It may be a little lightweight for a multi-day hard core backpacking trip where you need a heavier weight fabric with pit zips and pockets, but otherwise this thing is a work of art!