Arc'teryx Women's Gamma MX Jacket

high quality, excellent jacket
I love this jacket. It is incredibly lightweight, yet provides wind protection and warmth when needed. It is an excellent underlayer, but holds its own as outerwear as well. What really makes it stand out to me is how breathable this is. I can wear it on a chilly day for an outdoor workout and stay warm enough to be comfortable, yet not overheat while exerting myself. I've never had any other jacket be able to do this successfully. The cut is very flattering too. I can easily see myself wearing it often during at least three seasons of the year. I am 5'3", average build, and the size small fit me perfectly. The Arcteryx brand is expensive, but I definitely think this particular piece of clothing was worth the money for what it does.

Excellent Jacket for an active person!!!!
This is a great jacket that is all that it says it is. It is waterproof to extent but would not consider a waterproof shell. Very warm, works great for cold morning workouts. Jacket fits a little small, may need to get a size up. I am 5"7 and thin and need a medium if I wear layers under it. I would recommend this jacket to anyone who wants to battle the elements, cold, rain, wind during a run.

The Gamma MX is a lightweight insulating layer. It is lightly fleece lined. This is an item I would wear under a hard shell; in addition, to base layer(s) of your choice. I am new to Arc'Teryx products and it is hard to believe something so light could be warm. However, this is the new technology. I purchased the Lapis Lazuli color - bright royal blue - gorgeous!