Back on the comment after using "field" of almost two months.
As already said a user, it's mostly on the back of the poncho would need to be extended. Most certainly, a size L would have perfectly fulfilled its role by bike. The handles for the hands are not practical. But if you manage to thread onto the handlebars, so there it is the best! The front of the body and hands are well protected. The lightweight poncho is completely waterproof and allows breathing to drain as it does not stick to the body.
Ah yes, I forgot. I use it in case of heavy rain, with a pair of mid-gaiter. Your shoes are well protected, so you arrive at your destination dry (except the face)!
Despite its price, so I recommend this product. This is an excellent investment for those who go to work by bike! because it is a very good windproof (lately, we were served) ....