Standard Crutches: Basic mobility support is provided by regular crutches that are either wood or metal (e.g., underarm or forearm crutches).
Folding Canes: Mobile walking aids of a similar notion, but not solid enough for complete body support.
Ergonomic Crutches: Crutches which purport to decrease pressure on hands and arms, but these often do not fold up.
Folding Walking Frames: Some versions of folding frames are out there, but they are heavier and more cumbersome than crutches.
Portable Forearm Crutches: Lightweight, collapsible crutches that are somewhat uncommon yet provide a degree of portability.