Brett Danelskiwrote a review of Arc'teryx Epsilon LT Softshell Jacket - Men's on October 12, 2016
Familiarity: I've used it once or twice and have initial impressions
Fit: Runs small
If you ask my wife, she would say I probably spent a little too much time researching softshells. With so many excellent options, it is tough to choose! Basically, I was looking for the following criteria in this order:
1) TOUGHNESS: This jacket is tough! It is as durable as any softshell I have ever come across, and that is exactly what I wanted. I have no doubts that his jacket will withstand a lot of abuse and last for many years. The fabric is very different from most other softshell fabrics. Since most people are probably familiar with the all too popular NorthFace Bionic, in comparison, the Epsilon LT is thinner and just a little stiffer. It is built with a two-way stretch, so the jacket moves with you.
2) FLEECE BACKER: The fleece backer is a micro-backer in every sense. I think calling this a "fleece backed softshell" is almost a bit of a stretch. It is basically a shell jacket with a TINY bit of fleece fuzz. Personally, I would like it if the fleece was doubled (or even tripled) for just a bit for warmth and comfort, and this is the reason for the four star rating. I think the intent of the fleece backer on this jacket is only to wick moisture away from your skin, because it provides absolutely no insulation whatsoever. It does provide comfort for when the jacket is being worn with only a T-shirt.
FIT: As others have stated, the jacket is slim fitting. I am short and wide (5'7" - 190lbs) and I purchased a Large. The sleeves are long, but they always are for me. I have given up on that one. The rest of the jacket fits great. I am able to fit a lightweight fleece under it, but not much more. It is a true athletic fit.
Overall, this is a great jacket! For me, it will be perfect for everyday wear in spring and fall. I wore it today in a thunderstorm and it shrugged off the water with no problem. In winter, this jacket will be a great outer layer during high output activities. However, I wouldn't plan on wearing it during those brutally cold or windy days.