Small pet select seems the go to for most owners on IG...softer and less dusty than carefresh,,and a bit more affordable although the large 178l are sold out at present in the natural last time I looked.
Im personally using megazorb mixed with some cardboard as base atm to try first but the small pet select holds burrows well.
It is available on amazon or their website directly
Soft Paper Bedding - Small Pet Select UK