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 弹性物质织成的;织入橡皮筋的;有松紧带的 a skirt with an elasticated waist 有松紧腰带的裙子
Oxford Collocations DictionaryElasticated is used with these nouns:- waist