I wash all my athletic gear together, on gentle cycle, cold water and hang to dry. This was worn once, and laundered, and hung to dry. It has a small, very light discoloration at the back of the right shoulder which I have no idea from what. I treated it with laundry stain remover (oxi clean max force spray) - it faded but did not entirely come out - maybe you have other tricks up your sleeve? Similar fabric to the scuba hoodies. This one has ribbing and a funnel neck, thumb holes, and a sturdy silver metal zipper. Original tag available. I also have in my closet: Colorescie ce, Byron Lars, Anthropologie, vintage, Lululemon, Karen Millen, SKIMS, Black Halo, Old Gringo, Miss L Fire, Trashy Diva, Hammitt Los Angeles, Rab, Tracy Reese