100% Square Weave Cotton Ripstop - 145 gsm|Mesh venting to increase breathability in the under arm, upper back, front side seam and back side seam |Mechanical stretch to give you more freedom of movement|2 Chest pockets with pen partition|3M 8910 breathable reflective tape in hoop configuration|Reinforced at all key stress points with bar tacks|Sizes XXS - 5XL, 7XL - Syzmik