Fabulous! This is a great tri suit the combination of fabrics makes for a great fit and allows for maximum freedom of movement. It is cool and breathable and we love the styling. This is a good suit, tri suits are often under-rated in favour of separates, women worry that they are not as versatile and a bit odd! In fact they are brilliant , they keep everything together nicely reducing wobbly bits making for a better shape and you don�t have to worry about rising tops. Excellent fit under a wetsuit. A medium equates to a size 12.