Cotton,Spandex Pull On closure 95% Cotton,5% Spandex; Essential maternity short sleeve t-shirt, soft and comfortable for everyday wear; Size fit for bust(S)33-35" (M)35-37" (L)38-40" (XL)40-42" Ruching on both sides for a flattering fit, creates lots of space for your growing bump; Short sleeves design, round neck, side ruching detail, simply designed, but yet comfortable and complementing through all stages of pregnancy