Aiden Muscle Teemeet the aiden muscle tee from Frank & Eileen in white and british royal navy. aiden is our ultimate vintage inspired, boxy muscle tee. designed for a slightly cropped loose fit. fits true to size heritage jersey, 100% cotton our vintage inspired muscle tee has a relaxed, boxy silhouette that hangs beautifully against the torso. tiny cap sleeves and a raw edge hem add a stylish pop of detail. cropped hand cut raw hem and edges ribbed crew neck cap