100% polyester. Sides and under sleeves zip off to reveal mesh venting panels. Polyester mesh body lining with polyester mesh and polyester taffeta sleeve lining. Body armor pockets at elbows and shoulders. Lightly padded back waist and elbows, action back, adjustable waist tabs, and snap sleeve tabs. Two large horizontal interior pockets to store zip-off panels and one zipper vertical interior pocket with media port. 3M Scotchlite Reflective Material piping, stripes, and back graphics. Embroidered graphics on left chest and back.