Organic Bamboo Supersoft Maternity and Nursing Top 3/4 Long Sleeves Made of 95% Bamboo 5% Spandex. Surplice wrap styling draws a convergent perspective at the chest area. Great quality bamboo/spandex blend that gives this top a beautiful soft wrap quality. To nurse, pull neckline to either side to access openings on internal layer. Sizes: Small (upto 36" bust), Medium (upto 38.5" bust), Large (upto 41" bust), X Large (upto 43.5" bust)