Bettinis Cheeky Bottom in Black. - size S (also in ) Bettinis Cheeky Bottom in Black. - size S (also in ) 83% nylon 17% spandex. Hand wash cold. Elastic stretch fit. BTIN-WX153. 725. Bettinis bikinis fun, flirty and a full of life. Coming from the inspiration of North Carolina oceans, sand and seashells, Bettina gives a play on her name to create Bettinis so that every wearer can feel posh running down the beach.