This bottom is made in EcoLux™, Vitamin A's signature swim fabric crafted from recycled materials. EcoLux is a luxurious flat jersey with a soft, buttery hand feel that feels incredible on your skin. Vitamin A: California-designed swimwear blending feminine design with sustainable, luxe recycled fabrics. Tie sides. Minimal coverage. Size up if you prefer moderate coverage. XS = Hips 37-38" S = Hips 38-39" M = Hips 39-40" L = Hips 41-42" XL= Hips 43-45"