Ride On How to get the jump on a fall fashion trend: Team a pair of breeches that you might wear horseback riding with a big, bulky-knit sweater. Active and weekend wear have never worked so well together--that's because fashion now is as lean as classic athletic wear. For a more horsy look, wear riding-style boots with your breeches. Or for something unexpected, try them with slippers or low-cut flats. The breeches pictured here, $95, are from the Paddock Shop in Burbank. The sweater and pony-skin shoes by Esprit are at Bullock's.