This swim brief has a full coverage back and a lower leg line to keep it from creeping up. The belly panel can be worn up over your belly for full coverage, or folded down for medium or low belly coverage. This comfortable swim bottom is made from high quality fabric that resists chlorine 5 times longer than regular spandex fabric. A perfect look with our coordinating Mermaid Maternity tankini tops and swim shirts (sold separately). Fabric is Nylon/Xtra Life Lycra®. Lining is Polyester/Spandex. Hand wash. Air dry. To select your size: Generally, you should order your pre-pregnancy size. Pre-pregnancy 4-6 is size small, 8-10 is medium, 12-14 is large, 16-18 is XL, and 20 is XXL. Also, consider your current hip measurement (stand with feet together and measure around fullest part of hips). Our size small best accommodates a hip measurement of 38-39.5 inches. For medium, hips are 40-42 inches. For large, hips are 42.5-44.5 inches. For XL, hips are 45-47 inches. For XXL, hips are 48-50 inches. If you have specific fit questions feel free to contact us.