I have just I bought a fantastic pyjama (playsuit) which is also a guardsman uniform from play'n'wear, they have many more designs which I find fasinating. it is 100% cotton and washes well.
my son absolutely adores this suit and I am planning to get him more and order more for christmas presents - you can see more on playandwear.com.
I hope my recommendation is good?.. certainly a good investment for us!!