Lululemon Cool Racerback Race Length Tank Top *Nulu. This top is made of super soft Nulu fabric. It runs truee to size and does not have a shelf bra. You can wear a regular air racer back bra if ou don’t want straps to show or wear it with a Strappy sports bra. I have this top in severall colors and love t. Just trying too clear out my closet and make space for new items.