I have bought multiple "Name Brand" mattress protectors! I know that the way you laundry the mattress protector depends on how they will hold up! And, if they honor your warranty.....or not!! Laundry instructions are a huge deal! The other company gave specific laundry instructions! Instruction that made it clear you had to follow for  them to honor your warranty! But, all that you can find on the Allerease box or insert  is (Machine Washable)!! Nothing else! I even checked on their sight! You aren't told not to turn the mattress protector inside-out because the washing machine can destroy the protective coating! Nor the same for the dryer, and also DO NOT dry on the hottest heat setting!! None of this is included! So, when you get it wrong they'll be able to say you washed it incorrectly and that voids your warranty!! This is probably by far the worse instruction of any product that I have bought in a very long time!!