DP 448 B is a new mid-maturity Bollgard variety being released by Delta and Pine Land Company for the 2002 crop season. This variety was developed from DP 5415, using back-crossing, but this line was not a part of the NuCOTN 33B bulk. Field tests have been carried out on DP 448 B since 1996 to present. Comparisons to other Bollgard varieties from Delta and Pine Land Company (D&PL) tests and public sector tests (University variety trials and Extension / County Agent trial) are presented here. DP 448 B has a 5% better yield than NuCOTN 33B, based on the Beltwide summary of all tests (193 locations). The yield performance of DP 448 B is strongest in the western U.S., especially Arizona and the Imperial Valley of California. The agronomic characteristics and most fiber properties of DP 448 B are very similar to NuCOTN 33B. Fiber strength of DP 448 B is 0.6 g/tex less than NuCOTN 33B, while all other fiber properties are very similar. Plant mapping data indicates that DP 448 B begins fruiting earlier and completes its fruiting cycle slightly quicker to result in slightly earlier maturity. DP 448 B is slated as a replacement variety for NuCOTN 33B, with improved yield, similar agronomics, and similar fiber.