These T-shirts are made of a durable, comfortable, high quality Heavy Cotton™ 5.3 oz. fabric with an Adult Unisex cut. Model G500 Cotton 100% Weight 5.3 Oz Features: Classic fit 7/8" collar Only pictured colors are available Quarter-turned to eliminate center crease Safety Green is compliant with ANSI / ISEA 107 high visibility standards Tear-away label Double-needle stitching throughout Taped shoulder-to-shoulder Seamless rib at neck Ash Grey is 99% cotton, 1% polyester Sunset, Safety Pink, Russet, Neon (Green, Blue), Midnight, Lilac, Blackberry, Tweed, Safety Green, S. Orange, Dark Heather, Graphite Heather, and Heather (Military Green, Radiant Orchid, Red, Sapphire) are 50% cotton, 50% polyester Antique (Cherry Red, Jade Dome, Irish Green, Sapphire, Orange) and Sport Grey are 90% cotton, 10% polyester 100% preshrunk cotton