3XL Paul Kenney "The Godfather of Tiedye" #40 (HWI Dyed)PAUL HAS TRIED A NEW TECHNIQUE OF TIEDYING. He now is doing HWI ~ Kenney Style. and the COLORS of OFF THE CHAIN About HWI: Hot Water Irrigation (HWI) is a rinse out technique where hot water is poured or sprayed over a freshly dyed piece to help remove excess dye and set the color before washing. Its often used after batching (letting the dye react for several hours) to: Flush out loose dye particles Prevent color back staining during the first wash