Article of wearing apparel with detachable back extension

Claim 1

AN ARTICLE OF APPAREL OF THE CLASS DESCRIBED, COMPRISING A MULTI-LAYER JACKET-TYPE COLD WEATHER GARMENT, SAID ARTICLE BEING DESIGNED TO COVER THE UPPER PORTION OF THE WEARER''S BODY FROM APPROXIMATELY THE NECK TO THE WAIST, SAID ARTICLE INCLUDING AN INTEGRAL BACK PORTION, A BACK EXTENSION SECURABLE TO SAID BACK PORTION AT THE WAIST EDGE THEREOF TO EXTEND DOWNWARDLY THEREFROM, SAID BACK EXTENSION BEING OF A WIDTH APPROXIMATING THAT OF SAID BACK PORTION TO COVER ONLY THE REAR AND SIDE PORTIONS OF THE WEARER''S HIPS AND THIGHS, SAID BACK EXTENSION HAVING A TRIANGULAR PORTION CUT OUT OF THE MATERIAL AND FLARING OUTWARDLY TO THE EDGE OF THE MATERIAL ADJACENT EACH EXTREMITY OF THE WAIST EDGE OF SAID BACK EXTENSION, THE MARGINS OF EACH SAID CUTOUT BEING SEWN TOGETHER WHEREBY SAID BACK EXTENSION IS SHAPED TO CONFORM TO THE CURVATURE OF THE WEARER''S HIPS AND ADAPTED TO BE RECEIVED INSIDE THE SEAT SECTION OF THE WEARER''S TROUSERS, AND MEANS FOR DETACHABLY SECURING SAID EXTENSION TO SAID BACK PORTION WITH THAT EXTENSION EXTENDING DOWNWARDLY FROM THE WAIST EDGE OF SAID BACK PORTION.