Speedo Endurance Deflection Super Pro Back Youth SPEEDO Endurance Deflection Super Pro Back Youth SPEEDO Endurance Deflection Super Pro Back New! Thin strap silhouette with reinforced overlap binding with excellent support and freedom of motion. Made with Speedo Endurance+ fabric - Endurance+ is our longest lasting and best selling training suit fabric for a reason. It has 100% chlorine resistance, superior color retention, and its unique technology maintains a body hugging shape and soft comfort longer than conventional swimwear.