Arc’teryx Alpha LT Sizing

You're in luck buddy. I have at home an arcteryx alpha SV (heavier duty version of the LT but same cut) and a montbell UL down inner. I'm at work, but when I get home tonight, i'll check fit. I'll tell you this though, for the money and weight, I think you're better off going with an eVent jacket, or a UL rain jacket (like a marmot essence or mica) for your intended purposes. The Alpha series is really meant for a specific application (mountaineering, and alpine use that's subject to really harsh conditions). For basic backpacking and hiking, save your money and get something more suitable/comfortable.

Either way, I'll check in again tonight and update this thread.

I have a 2005 Marmot Essence Jacket that's made from the Precip material and it wets out in extended rain. I know the new Essence Jackets are different material and more robust. I'm not familiar with the Mica or Super mica Jackets, but want something bombproof that will hold up to pack straps and keep me bone dry if I have to sit through a 3-4 hour rainstorm at a football game or out in the field.

I'll look forward to your feedback. thanks again.

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Dan, i just checked…fit is very good. No pinching of loft, no tightness around arms, armpits, chest etc. Overall, very good mobility…I wouldn't worry about layering.

When you say that your old precip would wet out, do you mean that water would stop beading, or is water actually going through the jacket?

I still think for the money and weight, 3-layer eVent is superior, and durable enough.

My clothes underneath get soaked in prolonged rain even with the DWR renewed with nikwax.

I look to see if I can find any good deals on a Super Mica since I would like to have pit zips, and will do some additional research. I do, however, like the idea of the Alpha LT, but don't like the price tag. It does sound like the Large would get me where I'm going.

Thanks for checking the size for me. Your time and efforts are appreciated.

Dan

The MB Inner is pretty thin so I would suggest getting your normal size (a large). I'm usually a size small, including my MB inner and I have a size med LT which is huge. It's great for my purposes of layering over much thicker insulating layers, but too big for use just with the inner (well not really, just bigger than the more svelte cut I prefer).

If you have access to a gamma mx the following email exchange I had with Arc'Teryx may help you.

I'm 5'11 and 175 lbs and I have a medium Alpha LT. I can fit a big down jacket (MH Phantom) under it just fine. The sizing is generous as it's intended to go over insulating layers. I don't wear it backpacking anymore since I got a North Face Triumph, which is 1/2 the weight. Have had no issues with water resistance or durability with the Triumph. The Alpha LT is incrementally more breathable, and very durable (I bring it when I'm going climbing.)

Andrew

I wear a medium in Arcteryx and for me the Alpha LT is roomier then both the Alpha SL and Alpha FL jackets. It is not a big difference but noticeable – to me.

Dan, I have the Alpha SV in a large. I'm 6'2 and 175 (normal shoulders), I just tried a few insulating options over a R1 weight fleece that I happen to have on, I tried: MB inner jacket, Patty micro puff, FA Down sweater and all of them fit just fine with no restrictions.
I agree with Konrad- "I still think for the money and weight, 3-layer eVent is superior, and durable enough"

6'1 190lbs. I wear a Large Alpha LT. ( actually recently got rid of mine, no need for Goretex in the rockies IMO)

I can fit my Down sweater hoody under it no problem.

Get the large, trust me.

Best,

Bobby

Thanks for all the comments. I'll look into and do some further research on some of the 3 layer event jackets if they hold up just as well and probably will be cheaper.

Dan,
I'm not sure if you're still in the Kansas city metro or not but there are two dealers in overland park. Backwoods and dynamic earth. In fact they are pretty much across the street from each other. I personally prefer dynamic earth, but both are nice.