Soak up the sun in the Tommy Bahama Coastline Stripe Reversible String Bottom in Mare Navy. The Coastline Stripe Reversible String Bottom by Tommy Bahama is made of 85% Recycled Nylon and 15% Spandex. The Coastline Stripe Reversible String Bottom has a 3/8" side seam and features a reversible design and rubberized TB logo cord ends. For best results, handwash your Tommy Bahama swimwear.