Product review (1 stars): Barely works and not for long.
I was excited to find the "replacement" filter since the genuine Kenmore ones seem to have been discontinued. Granted, this has been a very long and cold winter with the furnace running far more than usual. I thought I was really stocked up, with one genuine Kenmore filter and six of these. Wrong!

As usual, the one remaining Kenmore filter lasted a good long time. These filters??? Forget it. Not only do they harden up really quickly so they don't absorb water any more, but the material they are made of breaks down quickly and floats around in the reservoir. At first I thought this was some kind of mold or bacterial growth (which can happen if the unit sits without running much), but realized it's inner filter material.

I am going to have to figure out something else, even if I have to cut down another good quality filter. I think doing this is the only viable option with the Kenmore 15408. Too bad.