Vintage 1989 Wyland, Swimming Killer Wales Single stitched

T-shirt collector sold collection. Stored in plastic bins for over 10 plus years. Yellowing, piling and stains, please see pictures. I do not have knowledge to wash shirts without damaging colors and graphics! Shirts sold as pictured Blue color Size XL 1989Wyland, National Wildlife Federation, Swimming Killer Wales graphic, great colors Previously loved