Abstract: Provided is an improved curtain for garage door windows, standard windows, and the like, with at least one curtain element overlying a support sleeve portion. The support sleeve portion is affixed adjacent the top edge of the curtain element such that the curtain element overlies the support sleeve portion in a smooth fashion and hangs naturally. The support sleeve portion provides for detachably installing the curtain over the window through the use of coacting hook and loop fasteners. The support sleeve portion further provides for rapid adjustment of the width of the curtain, dually through the use of elastic banding material contained within the support sleeve portion, and by crimping and detachably affixing the support sleeve portion to the associated coacting hook portion at selected intervals.