Premium is not a standardised category: it is a marketing word that can mean different things. You can, however, check concrete points: fibre type (length), yarn type (combed, compact), yarn count and weight.
A 100% cotton fabric with combed yarn of a fine count and long fibre is usually considered superior to a carded or open-end one. If an offer says only premium, ask for specifics: which cotton, which yarn, which count. Compare samples side by side, because the difference can be seen and felt by hand.
premiumcottonclaims
