providing an array of noncommunicating chambers spaced from each other and formed by means of a broadside of a first flexible, nonelastic, liquid impervious sheet securely engaged to a broadside of a second flexible, nonelastic, liquid impervious sheet, having affixed in proximity of an end of {HEAD ~ a broadside} of {TAIL ~ said securely engaged sheets} a component of a complimentary back to back releasable fastening means 
providing an array of noncommunicating chambers spaced from each other and formed by means of a broadside of a first flexible , nonelastic , liquid impervious sheet securely engaged to a broadside of a second flexible , nonelastic , liquid impervious sheet , having affixed in proximity of an end of { HEAD ~ a broadside } of { TAIL ~ said securely engaged sheets } a component of a complimentary back to back releasable fastening means
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