FRANK & EILEEN Tee Lab Base Layer Tank in Black. Knitted exclusively for Tee Lab with a dry light hand for effortless layering. Enjoy year round like a favorite vintage tee. 100% Cotton Jersey. This is truly THE base layer tank for every outfit. Go ahead and buy one in every color, plaid, and stripe you can get your hands on. Your closet will thank you and your layering abilities will suddenly become superhuman. This tank can be the starting point to nearly every Tee Lab look imaginable.