Kind of like a shank proof wedge which I have proven to be wrong. The kink proof are more kink resistant not kink proof. My wife can walk within 10 feet of an extension cord or a garden hose and both will immediately kink up or get into a knot. Bless her heart.
Want to talk about the expanding hoses? I have bought a shit load of those and finally found one last summer that works and doesn't blow up.