These custom team Open Backs are built with Atlantis, our new premium Italian fabric developed to last longer in the pool. It resists chlorine, holds its shape and has a soft feel.Fit Information:The Open Back has thin straps with an very open back design. It features moderate rear coverage. The thin straps are more stretchy and the style of the suit makes it feel like a looser fit, so we recommend sizing down in this suit. If you're between sizes or at the bottom to middle of a size range, choose the lower size / size down. If you're at the top of the size range, that size should be good for you. (Example: woman 5'7" & 139lbs falls in bottom/middle of size 34, but body measurements are between 32 & 34. Size 34 felt too big, would order a 32.)