i have just bought a fixed wheel 03 sport of ebay. The straps are fixed at the waist height iyswim so its more like a harness that holding him in position which is not a problem as he is 15 months old. But it has no liner or chest and buckle pads etc. it is just the basics. Can any one advise me what to buy (not to expensive as its only our going out for a walk buggy)to make it more comfortable for my little man ( he is quite small for his age ) with not much meat on his bones so needs to be kept warm