Old Navy Short-Sleeve UltraLite Cropped All-Day Rib-Knit T-Shirt A pretty pastel pink or blue Old Navy Short-Sleeve UltraLite Cropped All-Day Rib-Knit T-Shirt ($12) fits with any leggings and biker shorts but our editor loves pairing her neutral versions with jeans when not working out as well. Image Source: oldnavy.gap.com Old Navy Short-Sleeve UltraLite Cropped All-Day Rib-Knit T-Shirt $12 from oldnavy.gap.com Buy Now