Recognising most racers need their team kit clearly visible, this softshell layer with a water-repellent (DWR) treatment can be worn under any jersey for fast rides in wet and changeable conditions.
yeah - again, that is rather misleading imo - as it implies that the DWR will keep you dry even when you have a layer over the top - it won't as the top layer will prevent it from working. That's not to say you won't be warm - but you won't be dry.
http://www.rapha.cc/gb/en/shop/pro-team-softshell-base-layer/product/SHB01