I've tried boston 12, more breathable compared to other shoes. ada aircond compared to my Gel Nimbus shoe for my daily run. Very light and smooth, almost the same when using Magicspeed Carbon Plate shoe (use during race, interval). So far so good. Anyone having the same problem with me if lari by 2km onwards sdh panas kaki, then choose Boston 12. NB Rebel also nice, I wanna buy one next time when its available.