Very little down
These booties have very little down/loft. They are very thin. I returned mine because I was disappointed with them. The soles are nice and I like the elastic cinch. But overall, the down bootie is more just a bootie - hardly a down bootie. If you do decide to order them - I ordered size large which fit my size 10 foot well. Large was too small for my brother though, who wears a size 11/11.5.