Product review (4 stars): OK - Not as good as original filters 10+ years ago, but about as good as any others now available.
These were less expensive than others I have found (about $7 each w/shipping). They fatten up more than the others when wet a day or so, but wick water just fine. They sag under their own wet weight as do the others now days, but what I do is cut 6 wood skewers to length and run them from top to bottom to help support the filter. These and other brands last longer this way.
  I would buy these again, but they have not been available for awhile now.