UA Black Threadborne Seamless Crop Leggings Sz Large. In EUC, the compression in the pants are second to none. Ultra-tight, second-skin fit for a locked-in feel. Pass the bend test! Threadborne Seamless is a soft knit with engineered mesh ventilation, mapped to the places you need it most. Virtually seamless construction eliminates chafing. Material wicks sweat. Dries quickly. Wide, high-rise waistband for relentless coverage & support. Classic cropped construction for a chic new silhouette