Unbelieveable value and according to the reviews on M&S website, they review better than the more expensive cotton mix jumpers.
www.marksandspencer.com/gp/product/B0018QY6H8/sr=1-1/qid=1246535159/ref=sr_1_1/27 9-4167095-4732016?ie=UTF8&node=43646030&m=A2BO0OYVBKIQJM&keywords=&mnSBrand=core&size=9&rh=&page=
Don't forget that M&S have 3-for-2 at the moment on all school uniform and underwear.