Perfect shirt for vocalists - features an EKG pulse line with a microphone woven into the line. Great gift idea for any musician! You'll love the fit and feel of this super soft t-shirt. It'll instantly feel like that favorite, well-worn shirt you love. • 50% Polyester/ 25% Cotton/ 25% Rayon* • Durable rib neckband • Slim-fit • Crew neck * Tri-oatmeal is made of 50% polyester/ 37% cotton/ 13% rayon