Foldable zipper slider with improved compression-type latch

A foldable plastic slider with compression-type latch for straddling relation with a profiled plastic zipper, the straddling slider for closing or opening the zipper by movement therealong comprising a transverse support member having a pair of legs depending from opposite sides of said support member, a pair of sidewalls hinged to the opposite sides of said support member on opposite sides of the respective legs, said sidewalls being foldable relative to each other and having openings therein for receiving said depending legs, and means for interlocking said sidewalls to said depending legs comprising shoulder structure ending along an edge of each of said depending legs and flexible tongue structure extending along a corresponding edge in each of said sidewalls, flexible web structure at the ends of said flexible tongue structure connecting said ends to the respective sidewalls and for holding said flexible tongue structure in spaced relation to said sidewalls, said flexible tongue structure and said flexible web structure being depressible by the edge of said depending legs when said sidewalls are moved to folded position and said flexible tongue structure being adapted to snap into engagement with the respective shoulders on said legs, said flexible web structure when depressed acting to force said flexible tongue structure outwardly from said sidewalls into a fully locked condition with the respective shoulders on said legs to provide an improved compression-type latch for locking said sidewalls in their folded position on said zipper.