Most acro pilots realize this and fly with an acro harness allowing 2 reserves, generally they prefer a Rogallo as there main, and a standard PDA as a backup. The advantage of Rogallo's are that they are truly steerable. We have seen many pilots toss at acro competitions and steer the reserve in for a perfect spot landing, pack it back up and be on the next shuttle, no big deal! Available in one size, 200 lb max weight. Weight is 9.6 lbs. These pack large, so make sure your harness is compatible with the larger sized reserve.