Where it is desired to increase or change {TAIL ~ the filtering efficiency}, capacity or ability of the filter pad 10, {HEAD ~ adsorbents} or other filter material may be disposed in the pocket 12 in amounts sufficient to achieve the desired result, which amounts may be readily determined by one skilled in the art 
Where it is desired to increase or change { TAIL ~ the filtering efficiency } , capacity or ability of the filter pad 10 , { HEAD ~ adsorbents } or other filter material may be disposed in the pocket 12 in amounts sufficient to achieve the desired result , which amounts may be readily determined by one skilled in the art
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