These are soft/silky and won't add bulk under layers. Feels nice against the skin. I was close to returning them for another size BUT I don't think that would resolve my gripe about them. They are too short from crotch to waist. Much too short. If you have any kind of booty at all you are going to find they don't fully cover your bum. As soon as you bend over expect some serious builders bum action. If I size up the leg is going to be too loose and long so in the end I kept them and will try to shed some weight before they get their full on use on a cold holiday (that or get used to builders bum- LOL). If you're lucky enough to have a ickle peachy bum & flat tum this won't be a problem for you but if you have bountiful curves then just be aware of this.