Is it a sub dyed suit? Most folks who have spiderman, deadpool, etc hand wash, lay flat to dry
Off of Fabric on Demands website : "Most of our fabrics require little special care and feeding. We suggest a mild detergent with a gentle cycle for the first time the fabric is washed. Treat them as you would treat your other fabrics, but know that ours will be more forgiving. They are lightfast, colorfast, and will not run, smudge, or fade. Both the 7 and 10 ounce cotton duck should not be washed in a traditional washing machine. These fabrics should be washed by hand and hung or laid flat to dry."