GREAT offer on at Frugi atm (I'm only telling you because I have already put my order in! 
) - three for two.
So I just got a pair of trousers totally free.
I came across them when my DS were in cloth nappies because they make pyjamas big enough to fit the cloth nappy, but my DSs are 4.5 & 7 now and live in the Frugi lined trousers which are really comfy round the waist (lined, not hard and scratchy), warm, and wash really well.
Their tops are lovely too, the cotton is really thick so even if they seem expensive they are actually really nice quality and never get those dodgy holes in them!