Bathwear

For the dedicated couple, there are match-mate sets of casual clothing ranging from terry cloth bathwear to warm-up shirts.

Source: wiktionary

My father driving me to school in a bathrobe, like bathwear has suddenly come into fashion or something, that’s bizarre.

Source: wiktionary

“I took him shopping,” Val said. “For bathwear?” he said, nodding toward Bobby who was still wrapped in a towel. “No, of course not for bathwear.” “But you have an interest in bathing my son?”

Source: wiktionary