Abstract: Two main pieces (3, 4) each include a leg encircling portion (6) and an upper portion (12, 16). Each leg portion (6) has a side zipper (8) with a cover flap (10). The front of the leg portion (6) is a downward continuation of the upper portion (12, 16). Upper portion (16) has a front edge (18) that overlaps a front flap (14) on upper portion (12). Flap (14) and edge (18) slide with respect to each other in response to movements of the wearer. The overlap is sufficient to maintain coverage for the abdomen of the wearer. Alternatively, flap (14') may overlap edge (18'). Flap (14') is held in position by being received into a laterally opening patch pocket (20'). A belt (32) is secured to upper portions (12, 16) and has a front buckle (40) for adjusting the amount of overlap of flap (14) and edge (18) and a rear buckle (44) for adjusting the overall fit of the chaps (2).