4.2 oz., 50/38/12 poly/cotton/rayon (6.25% recycled poly, 6.25% organic cotton). Perfect fit. Unique eco-friendly fabric. Knitted imperfectly to create vintage striations just like your old-school physical education T-shirt. 3/4 bound collar. Blindstitching on sleeves and bottom hem. Low impact yarn-dyed and fabric washed. Enzyme finished. Sideseamed.