This is the actual jersey worn on the field by the players. It features spandex gussets. A gusset is an insert of material (side panels) added for extra strength and expansion. Only the authentic NFL football jerseys has these. Mesh body, double needle construction, external logos, drop tail, authentic NFL equipment loop label with the embroidered NFL equipment logo at the neck. External logos and stitched on numbers and lettering. Authentic Jerseys contain single, double, and triple layer stitching depending on the team.