While the Ajax has been on countless inclement ski tours and rainy trail runs with me, I really fell in love with it on a blazing-hot day of spring skiing. Being a henley, it allowed me to dump a good amount of heat when I opened the four snaps below the collar once I started sweating. On cold days, the extrathin polyester wicks moisture from my skin with the best of them, while also feeling cottony smooth. On top of that, the Ajax competes with the Momentum when it comes to style, thanks to the snaps and stripes. And it earns bonus points for being handmade in Minnesota.