I have the full '06 line from Sitka and it is hands down the best gear I have ever used. I wore it exclusively for archery elk in September, as well as late season archery mule deer in November and a turkey hunt in December. It is extremely durable and extremely comfortable. Go to their website for the specs on the materials and rest assured that they aren't hyping the gear through marketing...it is legit! When layered properly, it will keep you cool when it's hot (September) and warm when it's cold (December). It is made for a bowhunter, nice fitting, not baggy, and very, very usable. I can't imagine anyone being unsatisfied with the gear, or with the customer service.
Bowhunters have waited a long time for camo clothing of this caliber...
Corey