Great jacket
I selected this jacket over the Wind Shirt because of the zip up pockets and the ablity to stretch with movement and it ventalates well. This is a great backpacking jacket and it also looks fashionable in the city. I wanted the versitiliity. It is large enough to have a medium layer underneath, but, still fits well with only a t-shirt on. This jacket is true to size. When backpacking, this is one performance wilderness jacket for early morning and evening chills, wind and light rain. But, I also look cool downtown when I commute to work. I was always waiting for the jacket version of the Wind Shirt. Finally, now I have it. You will not regret getting this. This will be your go-to jacket. If you notice, gearheads have this on their backs. Even urban dwellers will get a sence of adventure wearing this, it makes a statement and lives up to it. But best of all, it's not that expensive. Just get it.

Great jacket
I use this coat for jogging it breathes nicely and still blocks out a good amount of wind. The weight is awesome. It is water resistant but will soak up water in heavy down pours. It is very flammable and will get holes quickly from sparks/ embers. Overall great product, very versatile. It could use a pull cord on the bottom to seal in heat. Great mid layer.

one item to always have with you
Own several of the "original". This is better. Comfortable, warm and easy to carry. Good for a first layer, and excellent second layer. Easy to layer because of the fabric, and weighs virtually nothing. I keep one on my chair to "throw on" to walk the dogs or catch the one in the yard who wll not come in. It is not waterproof but works great under a shell. When dirty wash on delicate and hang dry. They seem to last forever.

A Classic - But Better
This jacket takes the classic DriClime Windshirt and does it one better with stretch panels for ease of movement. Driclime windshirts have been my go-to layering pieces for years, since they're super warm for the weight, breatahble so you don't overheat, wind and water-resistant (not -proof), and best of all they slide so smoothly underneath other layers, you hardly know they're there. WAY better than regular old fleece. With the greater flexibility of the Catalyst, and the benefit of pockets, these have become my favorite garments of all time for multi-purpose layering.

Great lightweight jacket
I was looking for a lightweight, waterproof, windproof, breathable jacket to wear for skinning, and it has been great. On a normal Colorado day, I wear a midweight base layer and this jacket for my trip up the mountain, then take my down sweater out of my pack and wear it under the jacket for the descent.