Abstract: An insulating spacer creates a thermally insulating bridge between inner and outer panes of, for example, a multiple pane window unit. The spacer defines an insulated space between the panes and includes a top bridge member, first and second leg members, a bottom bridge member and a channel portion. The top bridge member contacts the inner and outer panes of the window unit. The top bridge member is made of a synthetic resin or composite material and can include openings. The first and second leg members are embedded into the top bridge member. The first and second leg members can be bent into a zig-zag configuration. The bottom bridge member is substantially parallel to the top bridge member. The channel portion is defined by the configuration of the top bridge member, the first and second leg members and the bottom bridge member. In one embodiment, the bottom bridge member is roll-formed from the same piece of material as the first and second leg members.