150D twill polyester material with double hemstitched pockets and seams to increase wear resistance from washing|Mesh underarm cooling ventilation panels|Extended length for better fit|Gusseted sides for expandable fit|Dual reflective chest straps|Safety D ring slot access on back|6 pockets with hook-and-loop fasteners (3 outside, 3 inside)|4 pen stalls and 1 ruler stall|Pocket and garment edges trimmed with polyester fabric to reduce abrasion and fraying|Machine washable