All our slippers are made from Portuguese imported cork, are vegetable dyed, lined with premium earth-friendly fleece with a soft eco-lux fabric backing to ensure no blisters or rubbing occur during wear. Our elastic has been tightened to perfected and our slippers fit best without socks, our slipper is designed to regulate heat during climate conditions (keep cold in summer and hot during winter) therefore barefoot is preferred. We use real Touch Pro quality cork fabric that is fused to a soft fabric backing. It’s also been treated with UV and abrasion protectants as well as scotch guard. This means it can be wiped clean with a baby wipe or soft cloth and water! It has similar durability and feel to animal leather but is vegan friendly, the brand is also PETA-certified Vegan.