The Alpha LT has quickly become my go-to jacket, getting grabbed before my Pac-lite shell, because it is THAT nice. The face fabric is unbelievably bomber, especially when you consider its weight(or lack thereof). The hood fits great with and without a helmet, which is something that not many companies can pull off. The cut is typical Arc'teryx, nice and slim without being restrictive or tight. At 6'3" and 200lbs, the XL fits me pretty much perfectly. The drop tail keeps the drafts out, even when bending over.

I would also completely agree with the reviewer below that compares this jacket with a luxury European car. Will another cheaper jacket do the job? Yes, absolutely. But if you have the means, this jacket will get it done with more comfort and style, not to mention last for quite a long time.

Got this vest as a more versatile insulation layer. Fit is excellent, marshmallow syndrome is kept to a minimum and the shell doesn't have the trashbag look/feel that many down pieces have. The 800 fill is extremely warm, lightweight, and compressible. Additionally, it shows no signs of leaking through the fabric or seams.

Bonus: The vest self stores in the left hand pocket.

Backcountry.com needs to restock these shirts, it is my new favorite t-shirt. The cut is perfect, snug without looking like spandex and has a nice drop in the back. Yeah, the armpits are a little higher than normal, but they are not uncomfortable at all. 6'3", 200lbs and the XL is great. The XXL would probably fit as well.

Quality is second to none as you would expect from Icebreaker. Great all-season weight and softness as well. However, make sure you really pay attention to the sizing chart. I am 6'3", a very athletic 200lbs and generally wear an XL in just about everything, except this... the XL is too tight in the chest a little on the short side as well, and yes I know this is a base layer and should be snug.

My advice is to pay close attention to the sizing chart (duh) and order based primarily on chest size and then height.

Update, the XXL is a perfect fit.

Great shirt, nice soft wool, appears to be constructed very well and the cut is nice. The sizing chart seems accurate enough, but if your chest is on the upper end of a size, I would recommend going up to the next size. I'm 6'3"and a very athletic 200lbs and I should have sized up to an XL. The large is a little snug under the armpits, not even really annoying, but just not perfect.

I purchased this jacket before it became known as the Siphon and it has quickly become one of my favorite jackets. The cut is extremely athletic (which is something not a lot of companies seem to get). I am 6'3" 195lbs and the Large is perfect. The sleeves are long (another bonus) and have a nice stretchy cuff on the inside of them to keep the cold out. It is very wind resistant, the outer shell is wool so yeah it might shed a little water or snow, but its definitely not the jacket to be wearing when there is a lot of it coming down.

Purchased this for trail runs and races after realizing that I didn't need to have 100oz of water contained in a very heavy and hot camelbak. Go to any Ultra and you will see mostly Nathan packs for a good reason. Rides higher and doesn't bounce at all when snugged up. Doesn't restrict movement or breathing and has plenty of easy accessible storage on the front for gels and salt capsules. The shoulder straps are a very thin material with a comfortable/soft brushed texture towards your skin. They seem fragile to me, but I haven't experienced any problems with them after a lot of miles.

Like the previous reviewer said, these glasses are much smaller than they look in the picture. Would probably work well for someone with a smaller face or a girl.

These are some pretty nice trail shorts. Very comfortable, quick drying, but a little noisy at times. The zippered pocket is also nice. The fit is much better than most running shorts since they don't balloon out just below the elastic waistband.

Nice shirt, but just not my style in red. Looks too much like a cycling jersey in my opinion. Never the less, it fits well and performs well. Slim but not tight fit.

Great jacket, the Paprika(Red) minimizes the trashbag look. It is unbelievably lightweight, packs down to nothing and I still have a hard time believing it keeps you as warm as it does.

However: I am a size Large in TNF, and had to exchange for a XL in this jacket because it was too small around the chest/back/armpits if you did anything but stand up straight.

Very nice jacket. Size Large in Anchorage Green fits me great (6'3" 185 with a long torso). Very athletic cut which is nice. The little snaps on the cuff are kind of annoying, but not a huge issue and could be easily cut off if necessary. I assume that they are for when you zip it into a shell.