These seat covers are easy to install. Unlike many seat covers, they don't have straps and bits of elastic that you have to tie up under the seat. Rather, they just have two short straps (more for the long back seat cover). They come with a durable round plastic buckle. Put a strap on a buckle. Then stick the buckle through the car seat, between the seat backs and the bottom of the backrest. Do the same for the other strap. They will hold the cover in place. The non-slip silicone backing will also ensure the covers stay put.
The soft car seat covers are fully washable. You can wash or rinse them under the tap or throw them in the washing machine. The plush fabric will not be damaged. Once you have washed them and they are dry, shake them well or blow them with a hairdryer. It will restore the softness of the plush material. If you are not going to use them for a while, you can easily roll them up for storage.