Keep feet warm and toasty with the Acorn Women's Sheepskin Removable Insole. This 100% authentic sheepskin insole fits seamlessly into any Acorn slipper with a removeable insole. The thick and plush premium grade sheepskin has a flexible EVA baselayer and a contoured arch for supreme support and improved comfort. The extra layer of four-season, naturally temperature regulating warmth adds an unmatched comfort experience for your feet.