With a free and more feminine cut than traditional baselayers, Rab's lightweight Women’s Wisp T-Shirt is ideal for wearing over a sports bra when the temperatures soar. In addition to adding strength and softness when worn against the skin, the low-bulk seams are offset to avoid friction when wearing a backpack. Built from lightweight, recycled polyester mesh, with cool, open-knit fabric and an antibacterial Polygiene finish, it's the perfect t-shirt for summer hiking in the hills. Womens Wisp T-Shirt