DetailsThese Canvass Head Blocks are use to block and style wigs or facial hair pieces on. Use Wig Blocking Tape to protect the lace from tearing. Use Blocking Pins #13 or #17 to avoid tearing the lace. If you're looking for a head to wash wigs on, look up the Silicone Wig Block. It's the same as these heads, but sealed with Silicone. The Silicone makes the Canvas Head water resistant.