While it presents a professional appearance on its own, our newly designed Pro-Ops™ Uniform Base Layer wears comfortably and pairs perfectly under our Pro-Ops™ External Ballistic Vest Cover. The top half of the base layer is the same fabric as our vest cover which allows for an exact color match. To support the unpredictable nature of your job–it’s constructed of performance mesh material with superior breathability and moisture-wicking properties to help keep you drier and more comfortable during every level of activity. Handy reinforced utility loop placed at the base of the placket for items needed nearby at all times and wire access in both side seams. The Pro-Ops™ Uniform Base Layer’s fundamental duty is to keep you at top performance.. 4.5 oz. Per Square Yard, Tropical Weave Top // Performance Knit Flat Back Mesh Bottom. 100% Polyester. Home Wash. . . Break Resistant Melamine Buttons. Convertible with Stays. . . . Short Sleeve