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 {TAIL ~ an end} of a broadside of {HEAD ~ 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 { TAIL ~ an end } of a broadside of { HEAD ~ said securely engaged sheets } a component of a complimentary back to back releasable fastening means
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