which shows an embodiment of the invention indicated generally at 102 the system includes three layers of flexible material which are peripherally joined to create two sealed pads in this embodiment layers 106 108 110 are co extensive enabling a single peripheral seal 111 to be used to join all three layers this creates two co extensive liquid and gas impermeable pads namely a pad between layers 106 and 108 and a separate pad between layers 108 and 110 the pad between layers 106 and 108 is filled with sodium acetate solution and an activator button 202 best seen in fig2 is used to activate the solution causing it to rise to the temperature on the order of 135 u00b0 f the pad formed between layers 108 and 110 is inflated through conduit 126 joined to the outermost layer through connector 128 conduit 126 is inflated from an available co 2 or other gas supply though in alternative embodiments an acid base mixture or a manually operated bulb may instead be used as described in further detail below on one side edge of the assembly 102 there is a flap 104 including the first portion of a hook and loop fastener material 132 at its distal end a second strip of hook and loop material 130 is disposed on the outermost surface 110 at the other opposing side edge of the assembly 102 a bent wire 122 is entrapped by.