I would be tempted to follow the recommended washing instructions if it was an expensive garment. If it was a cheaper garment then I might risk the dryer.
I do have a shirt that is made of recycled plastic bottles and it goes in the dryer on days when we can't peg out the laundry but to be fair we don't have the heat setting too high.
Hotel etiquette - has it been forgotten?
Preston Davey, another baby P.
