4.6 OZ., 100 PERCENT RING SPUN COTTON (SOLID COLORS). 4.4 OZ., 80/20 RING SPUN COTTON/POLYESTER (DARK GREY HEATHER). DURABLE RIB KNIT CREW NECK WITH INTERIOR TAPING. HEAT TRANSFER LABEL FOR TAG-FREE COMFORT. DOUBLE-NEEDLE STITCHING THROUGHOUT. CONTRAST HEAT TRANSFER SWOOSH DESIGN TRADEMARK ON LEFT SLEEVE. COMPLIES WITH PROP 65.