Glider Wings are a mix between a hang-glider and a wingsuit, first (and currently only) seen in Call of Duty: Black Ops II. They are used in sky-diving operations in almost exactly the same way as parachutes had been used in the past. It is used by the Mercs in "Odysseus" and by Section and his team in "Judgement Day".
A group of three soldiers using jet-powered Glider Wings.
Section's view while sky-diving with an Glider Wing in "Judgement Day".