For those looking for the quality and protection of an Armadillo Rib Vest, but without the bulk of the chest protector, take a good look at the Armadillo Rib Protector.
Specs: Complete Rib Coverage, Padded Back Panel, Adjustable Side Panels, Quick Release Buckles
Measure around the drivers rib cage. Find the size from the chart that best matches your measurement.
Small 30 35
Medium 34 39
Large 38 43
X-Large 42 47