Columbia Little Boys' Mini Breaker II Short Sleeve Sunguard, Chartreuse, XX-Small 88% Polyester/12% Elastane; 84% Polyester/16% Elastane Imported Machine Wash Ultimate comfort and protection for long hours in the sun, this stretchy, sweat-wicking sun guard features a longer sleeve length for protection all the way to the elbow. It dries quickly and seals out UV rays with built-in UPF 50. Omni-wick Omni-shade UPF 50 sun protection Comfort stretch Quick dry