First, each of the four filters I ordered, the plastic wrap was ripped in the same places; more than one rip.
Second, 20x25x5 turns out to be same size as the Filtrete 20x25x4 I am now using
Third, tried to figure out why I was having sinus issues a day or two after I put one of these filters in...at first I thought it was the smoke from outside but these are suppose to filter pm2.5 with ease, right? Sneezing, congestion, doing sinus rinses, nothing helping. So, went to new Filtrete, within 24 hours most of my sinus issues went away, by 36 hours I am throwing these away and sticking to my MERV 12 filtrete filters.
Quality-wise, dimensions same as 3M Filtrete, exactly, Filtrete calls it 4" Filterbuy calls it 5". Filtrete is sturdier, thicker cardboard, than Filterbuy.
The box filters were shipped in was undamaged so ripped plastic wrap on each filter not FedEx caused.