This mail away was offered from Hasbro Direct for flag points located on the back of specially-marked G.I.Joe products. This set came with the following pieces: Mask, Helmet, Parachute and Waist Strap. This could be added to most G.I.Joe figures to simulate a HALO jumper.
The HALO Mail-Away pack came with blueprints/instructions for some assembly, but no figures.