The one piece of Sitka Gear I wear more than any other is the Jetstream vest. I not only wear this during hunting season, but pretty much everywhere I go. I love this vest and is a very essential piece to my Sitka Gear system. There has been countless times where I have been hiking in cooler weather where I only need my core zip t and when I stop to take a break or glass for a bit it can get a little chilly. This is the ideal time to throw on the vest as it keeps your core warm, which in return will keep you completely warm. On those colder days I will layer with the core zip t and 90% jacket. Sometimes it just isn't enough and again this is where the Jetstream vest fits in great. It works great as both an outer layer over the 90% jacket and inside of it. For even colder days I use a Traverse zip t over my core, which keeps me out there longer. The more time spent in the elements means more chances at filling tags. I also love the fact of not having a bulky sleeve and still having the capability of warmth. The Jetstream vest is cut to form fit, which keeps the bulk out of the way. It can make a huge difference when in thick cover trying to shoot. It's tough to beat the Jetstream vest for versatility. There isn't a trip out hunting I go on that my Jetstream vest stays home. Right at 1 lb it is lightweight and easy to pack along.
The vest comes with 1 chest pocket and 2 side pockets, which is just enough to place gear you need available yet not too many to where you are searching for things. It has a soft outershell with a fleece lining. It is made to keep you warm from the wind and does a great job at it. Every piece of Sitka Gear serves a specific purpose and without putting together a system you are truly missing out. I wrote earlier in review of the system I have put together suggest by the system builder on the Sitka site and it has worked wonders. Sitka Gear just re-vamped their website and offers lots of videos and information to any questions you may have.