An end cap for use in a shade assembly in a vehicle. The end cap is capable of folding and includes a base and a linkage pivotally connected to the base. The end cap also includes an extension pivotally connected to the linkage. The folding end cap will allow for the effective length of the end cap to be reduced by pivoting the extension of the end cap in an approximate 180° arc such that it engages and is secured to the base on an outer surface thereof.