I agree with the reviewer William Kong who says the piece is to bulky for the pack. It's not that you couldn't compress it down for the pack, but if you need significant packable warmth then down is your best bet anyway. I love this piece for around town, or the campsite, in temps from 15F to 40F. it is my go to piece for that temp range. I have read some reviews that imply a level of warmth beyond that, but unless you are involved aerobically, which changes the equation seriously, I would say 15F to 40F for the average user. Also, at the bottom of that range it will need help. At 15F a t-shirt and the parka will not be enough unless your adding aerobic activity .. And below 15F I say it's time for down. It is nice with these synthetic pieces to not always be puff the magic dragon. It has a butt load of usable pockets, the hood is in fact drawchord adjustable with the adjustment just behind your head on the exterior of the hood. It does only have one waist draw chord so you may find yourself with a long piece hanging off if you are cinching it up a lot. I got this piece on sale for $169. If you don't have a pro deal this is a decent price to buy at. 50% would be better but BD at 50% off is hard to find. I was going to give four stars, but I thought the one two star review, about the hood etc. ?, was unfair and unclear so I gave it five.