Pre washed, will not shrink.
Wash your hammam towels with similar colours. Hammam towels can be washed at 60 degrees and can be tumbled dry.
The use of fabric softener can make hammam towels less absorbent. So do not use fabric softener or use as little as possible. We advise not to iron the hammam towels, as it will close the fibers which makes it less absorbent.