If you were going on a long-distance motorcycle trip with your girlfriend to, say, Vietnam, then you probably wouldn't want your girl to do it in a figure-clenching one-piece motorcycle suit. No, you'd want her to slip into something more comfortable, like this stylish 2-piece Alpinestars Women's Stella Monza motorcycle suit.
Suitable, this one is just in white and black, but if you think that white gets easily dirty, then the all black option look equally as classy.
Technical low-down goes like this: 1.3m full grain cow leather, 'accordion' stretchy panels, CE shoulder and elbow armor, washable liner, ultra-vented frontal surface for maximum cooling while you ride, low-profile hump and neoprene collar for a bit extra comfort.
Evidently, you get a damned decent motorcycle suit for less than US$ 680 (21,080 THB) these days.