Every man needs a good pyjamas. Right now I only own one, a German-made Schiesser Revival which is very good. But I can't help missing my old Derek Rose, as it was made of a very crisp cotton fabric that was great in the summer, when it got very warm.
Derek Rose has been around since 1926 and is still family-owned. They have specialized in making luxurious nightwear. Unfortunately they're not made in Britain any longer (Czech Republic, if I remember correctly), but the quality is still up there.