ALL COTTON AND COTTON HEMP: COLD WATER-MILD SOAP-NO BLEACH-NO SOFTENER-WASH SEPARATELY-TUMBLE DRY
100% CASHMERE: DRY CLEAN ONLY
VELVET AND SILK: DRY CLEAN ONLY
It’s especially important to wash clothing that you will wear when sweating, cautions Hogue: “If you’re going to wear it out and in the heat and sweat in it, you should launder it before wearing it. “
Another suggestion is that you "wash separately before wearing".
Clothing that are dark or bright some of the dyes could run off on other clothes or even on your skin.
Washing these items once before you wear them will get rid of the excess dye.