closure device 54 the major pattern piece 62 can be made to provide the fly 56 and the fly opening would face in the opposite direction from that shown in fig1 a hook and loop type fastener such as velcro may also be used as a closure device 54 especially where the fill material 60 is fibrous or is separately contained as noted above in a preferred embodiment as shown in fig3 a a casing member is constructed from a fleece like material such as polarfleece the casing member has an over all width w the width w ranges from about fourteen to twenty inches depending on how large a potential cross section length l is desired the crotch space 54 of the fabric member 46 has an entrance o of about four inches the base 32 portion of the fabric member 46 has a depth d ranging about five to nine inches the depth d is substantially uniform around the curvature of the base 32 section of the fabric member 46 as shown in fig3 a in a preferred embodiment for a normal adult the width w is about eighteen inches the depth d is about seven and one half inches and the entrance o is about four inches in this embodiment the seam 51 is sewn on a stitch line 66 about one quarter inch from the edge 68 of the perimeter 50 of the fabric member 46 while the above description contains many specifics these should not be construed as limitations on the scope of the invention but rather as exemplifications of one or another preferred embodiment thereof many other variation are possible which would.