[en] Initial designs for direct-drive targets for the National Ignition Facility had a one-dimensional (1-D) gain of 45. A pure cryogenic DT shell with the fuel set on a = 3 adiabat was used to provide adequate hydrodynamic stability. One-dimensional calculations indicate that a gain of over 80 may be achieved through the use of an outer layer of foam wetted by cryogenic deuterium and tritium (DT). The presence of higher-Z absorbers (C) in the foam increases the absorbed energy, allowing the target to contain more fuel