I have a good tip. If your looking at getting an elevation mask for training buy it from the manufacturer. They may be a few bucks more but worth it. Most Fridays they have free stuff Fridays. You will get an e mail and be able to get the item for free just pay for shipping. I was able to get several replacement covers on Friday for about $5. You can only get this deal if you buy directly from them and they are always running great deals. They had a 2 mask for $100 deal before Christmas. Hope it helps. Roll on.