This Dark blue Aquiline four button dressage jacket is very cooling and has a lovely drape on the body. It is flattering, not a black jacket and you will not die from heat stroke in it. It will not offend the most traditional judge. It will not inhibit your ride in any aspect. I loved wearing this jacket. It has had very little wear in the show ring and has been kept in the house in its own bag. It is in pristine condition. An Italian 46 is equivalent to a 10-12 or L in US sizes.