Leather and suede slippers
Smooth or napped, and what a leather label is supposed to tell you.
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Smooth leather and suede
Smooth leather uses the outer surface of the hide. It wipes clean and develops a sheen with wear. Suede is leather with a napped, velvety surface. It feels soft but marks and absorbs liquids more easily.
What US labeling guides say
The FTC's guides for leather products treat footwear as three parts: the upper, the lining and sock, and the outersole. If some of those parts are not leather, the guides call for that to be disclosed. Material made from ground, shredded, or bonded leather should not simply be called "leather".
The same guides say "waterproof" should only describe a product that keeps water out under normal use for its expected life.

Reading a listing
Look for how the maker describes each part. For example: "The maker lists the upper as suede leather." Terms like "leather-look" or "PU" usually mean a synthetic.
Break-in
Leather and suede often soften with wear. A firm first fit usually eases.
FAQ
General information, not medical advice. If you have foot pain, diabetes, or circulation problems, ask a doctor or podiatrist before choosing footwear.
Related guides
Synthetics explained
Foam, fleece, and faux materials.