The Billabong Keep It Mellow Lowrider Bottom thrives on high doses of sunshine, saltwater and positive vibes. Made from soft and stretchy recycled swim fabric, the tie-dye bikini bottoms feature a Lowrider silhouette with a taller front and back rise and fuller bum coverage, creating a flattering fit for all shapes. A departure from the classic, the tie-dye swim bottoms add twisted side seams.