This sumptuous tank top is made from a blend of organic bamboo viscose, organic cotton and a touch of spandex for a nice stretch. The fit is snug for use as an underlayer without bulk. Size up if you prefer a gentler fit or if you fall between sizes. Completely opaque so it can be worn on its own. Wide shoulders easily hide bra straps. A great capstone piece that will complement a variety of outfits.