Speedo Endurance Atomic Dots Y-Back - Youth SPEEDO Endurance Atomic Dots Y-Back - Youth New Print! Open back featuring thin strap silhouette for comfort and mobility with splicing that has a new sporty look. Made with Speedo Endurance+ fabric - Speedo's Endurance+ is our longest lasting and best selling training suit fabric for a reason. It has 100% chlorine resistance, superior color retention, and it's unique Four-Way Stretch technology maintains a body hugging shape and soft comfort longer than conventional swimwear. Gender: Female