A4 N4139 - Adult Practice Jersey Polyester N4139 A4 Adult Practice Jersey Practice makes perfect, so make sure the entire team is sporting this quality performance practice jersey. Coordinate: Youth NB4139 100% Polyester Warp Knit 5.9 oz. Trim/Contrast: 100% Polyester Mesh, 8.8-oz. moisture wicking odor resistant stain release double-layer yoke V-neck 1x1 knit trim reinforced cover seam finish Sizes: M-4XL