Solid colors are 100% cottonHeather colors are 50% cotton, 50% polyester (Sport Grey is 90% cotton, 10% polyester)Antique colors are 60% cotton, 40% polyesterCare instructionsMachine wash: warm (max 40C or 105F); Non-chlorine: bleach as needed; Tumble dry: medium; Do not iron; Do not dry-clean.Due to variations of light and color settings of computer/personal device screens, colors may appear slightly different from photographic images.Due to the manufacturing process, sizes of items listed in descriptions are approximate and actual size may vary slightly.Due to the manufacturing process, alignment of images may vary slightly