Melamine high impact buttons Machine washable; to maintain fabric wicking do not use liquid fabric softener Internal collar stays Cross-stitched shoulder straps Fabric: 100% polyester tropical weave (upper) - 100% polyester interlock knit (lower) Nano Moisture Wicking and Anti-Microbial Technologies Three button placket with mic loop Comm wire access openings in both side seams Flex Underarm Vent allows for body heat ventilation and increased mobility, available in short and long sleeve Top-fused convertible collar with tagless neck for no-scratch comfort Weight: 5.5 oz./sq. yd. (upper), 3.5 oz./sq. yd. (lower)