Some hints: Wash black clothes with other dark items. Make sure the pockets don't have anything in them. Wash them inside out. Don't use bleach. Don't wash with any towels.
What can be added to laundry during wash cycle to eliminate white specs (pills) from black cotton?
You cannot wash those away. You need to shave them off. You can use a razor or buy a clothes shaver at Walmart or Target.