Star Trek Greatest Crew Members Natural T-Shirt. 100% official Star Trek T-Shirt. Unisex lightweight tee with a soft feel. Made from 100% combed, ringspun cotton. Lightly distressed print. Made from natural, unprocessed and unbleached cotton, resulting in small dark flecks from the raw fibres throughout â giving your tee a naturally unique, lived-in look. Unisex style: please check our custom size chart to help find your ideal fit. Exclusive TruffleShuffle design. .