Proton SL Hoody Men's

Bought this a few months ago and love the fit warmth it gives while also being breathable. DWR does the job in light rain. A great piece on it's own for transitional weather, and will be a good mid-layer underneath a gore-tex shell for the cold rainy hikes to come.

It's comfortable to wear, great for spring and fall. Rain resistance for short term, quick dry. No complaints after two months. Long term review pending. Bought second one for dad cause I likes it so much.

Bought this piece as a mid layer primarily for higher output activities like spring/fall hiking and snowboarding in the winter. This jacket is perfect for those that tend to run hot and want something that provides breathability as well as warmth from anywhere around +5C with just a t-shirt underneath. Adding a proper base layer as well as a fleece underneath makes it perfect for me from 0C to -10C depending on wind/sun conditions.

I have the photon lt & wanted something for hiking that was lighter. This fits the bill toss a shell over or vest over or under and you can expand the temp range.

I have owned this jacket for only a week now but i am already really impressed with it's performance and versatility, i have been using it to cycle to work on chilly mornings (around 10 degrees Celsius) with just a t-shirt underneath and it is warm without being overly warm but just breathes so well (better than any other jacket i have ever owned) so i arrive at work at a comfortable temperature and dont feel overheated or feel the need to take it off at all and it performs just as well hiking up hills, i am really impressed with the balance between wind resistance and air permeability, this jacket is also ultra light and packable which is just a huge bonus to an already great jacket, i cant think of any cons what so ever to this jacket and cant wait to use it as a layering piece under a Beta SV in some nasty autumn Downpours

This jacket has been of perfect use during spring time winter mountaineering and for hikes in the Alps during late spring-early summer. I put in on and leave it on as the warth/breathability ratio is perfect. Although I have become hot in it at times, the breathability is so great, it was never too much. Has just enough of wind protection for most of times, it is hard to find a jacket with such an awesome breathability/windstopper ratio. It's very thin fabric, but feels quite durable as I haven't snagged it with my ice axes yet. DWR is amazing, works very well for light rain or some snow. I am 174 cm and 53 kilos, very slim, size small is perfect as the other versions of the Proton (LT, AR). It's insanely comfortable, the non-insulated hood is great, only to cut the wind if I really need it. There are 4 pockets on the outside, feels too much for such a jacket, but on the other side it makes it versatile depending on the activity or the kind of backpack using. Sleeve cuffs are tight and stretchy. After 4 months of use I am happy with the purchase being quite expensive.

The Proton FL caught me by surprise, I think it is an absolute sleeper in Arc's lineup. I've got to admit when I first saw it, read about it and even tried it on in person I wasn't really blown away or sold on it. But after using it, it has quickly risen to the top of the heap and is one of my favorite Arc pieces. It breathes incredibly well, I like the two front chest pockets which also block some wind and add slight warmth. This is a Goldilocks piece. Throw a windbreaker or shell over the top and it becomes substantially warmer. Great piece for thermoregulation. I am in the Bay Area and spend time around California so the weather is very temperate - keep that in mind. I am not in Manitoba. For the weather I experience most often this piece works wonderfully. The un-isulated hood had me questioning the design team at first, but after using it, its a favorite feature of mine. It's perfect to put over a beanie or balaclava and adds tons of warmth by just cutting the wind down it moves with you never restricting head movement or impairing vision and when its down it disappears, no bulk - perfect. Anyone complaining about this feature didn't buy the right jacket for the job. The Proton FL is for on the move activities not for standing around and if you use it for what it was intended for it shines. The cut is very slim/athletic. Nice and close fitting through the arms and torso, but still allows for a light layer underneath like a Delta, but not much more. My only gripe is the length of the front hem, it is very short, I love the longer drop tail in the back, but I wish the front hem was 0.5 - 1" longer in the front, I don't understand the benefit to having it so short in the front. Armpits fit very well, they don't climb up and dig ( I had to return the Proton LT because the armpits were digging into me) The best sign of a good piece is you forget you have it on and the proton FL does that. Fit/Sizing 6' 165lbs 40" chest Atheltic longer toros Medium fits perfect, just need a slightly longer hem like the Proton LT has. Nice work with this one Arc!