This lightweight outdoor chair cover is a generous size and seems durable with straps to make it snug. It has a separate blue pillow that's inflatable and you get an air pump to inflate the pillow that goes underneath the cover to prevent water build up on the seat area.
I never use the inflatable thing bc we live in SoCal, but the covers fit perfectly and work well. They are light which is nice but i must warn, the fabric is very thin and easy to rip around corners if you pull too hard. Still price was right and they have been a good buy.