Cushions for garden seating (Richings Park SL0)

I have 8 of the 60 x 60 cms (24”) and 3 of the 60 x 30 cms (24 x12”) cushions.
They were originally only with a very thin layer of foam and I have added old pillows to plump them up. They are not pristine, could do with a wash but covers are removable and one corner of one has been nibbled by something. No fire labels as outside use.