Color Sky Marble ButterSoft: Featured in Marble Collection. It's got the lightweight hand of StretchSilk with the soft base of ButterSilk - but multiply that softness because of the brushed texture! The Bliss Baby Tee is buttery soft, but has just enough compression to sculpt your body. My favorite part is the open back. It's breathable and looks amazing. And can we talk about the raglan sleeve?! You can raise your arms without the rest of the shirt raising up! YES! nylon and spandex material