The laundry company I use (in the UK) are pretty awful. They only tumble-dry on a high heat and when I first tried them (as a naïve 19 year old who figured all clothes could be tumble-dryed unless they were silk or whatever) they shrunk about £500 of brand new clothes. Looking back, I feel stupid for not checking the labels, but I've since found it very hard to find clothes that are ok at high-heat.