ANSI 107 1999 Class 3 Compliant with short sleeves and cool fabric. Background material is 100 percent Polyester, breathable open weave knit mesh. 2 inch 3M Scotchlite 8910 reflective tape is compliant with Class 3 configuration- Two 360 degree horizontal reflective stripes plus two vertical shoulder stripes plus two sleeve stripes. Hook and loop closure. Machine washable. Great for warm environments.