Very fast delivery in three days, good packaging in sturdy box. I was surprised to find the package in my mailbox, I usual by hand, but that does not bother me. The filter is excellent, the air coming out of the vacuum motor is so pure allergen free and odor free, more washable. I was afraid that it is not compatible with my vacuum cleaner ELECTROLUX ULTRA SILENCE but it is perfectly compatible. I recommend this filter for people allergic to dust mites or have asthma. I recommend in addition to using allergy vacuum cleaner bags. I hope my advice will be useful to you. Cordielement