Rio Back Low Rise Bikini Bottom Sewing Pattern is great for fitness competitions or the pool, beach or spa. Rio cut fitness bottom sewing pattern can have full lining. Don’t forget to add a gathered in the back to accentuate your booty. Keep in mind that some fabrics may not be suitable for chlorine or salt water exposure. Let me know if you have any questions about this sewing pattern. Use of a binding foot is recommended but not required. I never used a binding foot.