These soft, quilted underwear are warm. The fabric that touches the skin is 100% cotton, so you can dress your baby with peace of mind, even if they have sensitive skin (^^) One layer of this in the chilly autumn, or layered under clothes in the cold winter, will keep you warm and cozy (^^) I used these when I went back to my parents' house, so I didn't wear them very often. They have been washed and stored. (No fabric softener used)