This Wilson Spring Kaos Print Crew is lightweight and has sun protection making it perfect for outdoor tennis. It is a great option for training juniors that want to rep their favorite brand. Looking sharp to match the Burn and Burn FST racquets used by Nishikori and Del Potro, the Kaos Print Crew is made of 100% polyester knit and nanoWik for ultimate comfort on hot summer days. This Wilson crew features a ribbed crew neck, inner neck tape for added comfort, contrast striping at shoulders, tonal mesh panels at sides for enhanced ventilation. Always aware of function and performance, Wilson's Spring Kaos Print Crew uses nanoUV fabric with at least 30+ UPF.