Excellent product, but the sizings are awful. Small body measurements were fine for me, but they don't give you the actual gilet size, and when the battery was inserted in the pocket I was unable to do up the zip due to the width of the battery adding extra inches. I got Medium down, and this was massive, hence useless as the gilet should be close fitting to feel the benefit of the heat. Julia and Sam from Customer Services couldn't have been more helpful, but Neva, who took over, won't refund me the £7.60 postage that Sam refunded for me, and now Neva never answers any of my emails! Customer Services has now turned from brilliant to Customer without the Service! What a disappointment! I was really looking forward to having a quality gilet!