So far I've used this on just one winter backpacking trip, and a few times around the apartment.

Pros:

- Very warm. Lots of insulation, and the cord locks seal in even more heat if you need to, and keep out snow etc. The fact that no snow melted or froze on these shows how well it kept the heat in.

- Fabric seems fairly durable (but not the stitching), and water resistant. I walked around in the snow a lot around my campsite, and these were fine. The 'Polar Proven' writing on the sole wears off immediately, but that has no effect on the usability of the product

- lightweight

- Vegan (most booties are made with down)

Cons:

- Stitching came loose after a few days! at the front of the toes, right wear the front of the sole meets the bottom of the black reinforcing nylon. Haven't noticed seam tears elsewhere yet, but have seen a few loose threads.

- Not compressible. I packed these in a compression sack for a day, but the soles are stiff and so these don't compress much.

- Writing on the sole comes off and can get on your stuff- after a few hours in an expensive sil-nylon stuff sack, that sack now has the 'Polar Proven' writing permanently marked all over it, kinda like an iron-on pattern. It doesn't bother me that much, just adds character to my gear, but that writing is just silly and they should get rid of it or make it last longer. I don't think it had any effect on traction when it was there anyway.

Note on sizing: I wear a men's 11 - 11.5, and got a large, and found these slightly short. Definitely wearable, but tight in the toes. So I'd recommend a larger size.

Bottom line, if these would hold up better, they'd be great. Eventually I will get around to having the damaged sole repaired, or do it myself, but it might be tricky to sew because of the location of the tear. Currently, they are still usable despite the damage, but I haven't used them much. If you get these, realize that repairing these will be necessary and inevitable, and soon after you start using them. As it is, there are few vegan booty options out there, and these are inexpensive, so as long as you're okay with the inevitable repairs, you'll probably like them.