elasticated
adjective (British English)(of clothing, or part of a piece of clothing )衣服或衣服某部分 made using elastic material that can stretch 彈性物質織成的;織入橡皮筋的;有鬆緊帶的 a skirt with an elasticated waist 有鬆緊腰帶的裙子
Oxford Collocations DictionaryElasticated is used with these nouns:- waist