Lululemon Cool Racerback II Nulu The Lululemon Cool Racerback II Nulu ($48) is this editor's personal favourite. It's long enough to feel covered and secure, layers over sports bras well, and comes in buttery soft Nulu fabric. Image Source: shop.lululemon.com Lululemon Cool Racerback II Nulu $48 from shop.lululemon.com Buy Now