A lot of companies sell special Chow Mein noodles by that name only or a few also sell them by the name chow. But some of these noodles have eggs in them. If you don't eat eggs check the ingredients before buying. Otherwise, buy any type of wheat noodle with a medium thickness. Even Hakka noodles or instant ramen can be used to make it. Don't use noodles with very thin strands like vermicelli to make chow mein.