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Dye polyester and poly/cotton or poly/rayon blends

Jacquard iDye and iDye Poly

iDye Poly is disperse dye that can be used to dye polyester, nylon, and acrylic. (Note that regular iDye is a direct dye that can be used only on natural fibers such as cotton; it can be mixed with iDye Poly to dye polyester blends.)

Unfortunately, you cannot dye a North Face Denali jacket. The polyester fleece has a DWR water-resistant coating, which will also resist dye. There is no way you can remove a DWR coating well enough to get a good result from dyeing.

If the fleece did not have the DWR coating, it would be dyeable by boiling it with disperse dye, which is the only kind of dye that can color polyester. Ordinary dyes such as Rit or Dylon will not work at all on polyester. You would also need a very large stainless steel or enamel cooking pot to do the dyeing in, since polyester requires so much boiling in order to take even the right kind of dye. A dyeing pot is a good investment for someone who's going to be doing a lot of dyeing with hot water dyes, but it costs almost as much as a new jacket, so it's not a money saver for a one-time use.

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