4Pc Silica Crystal Cat Litters 3.8L Comfort Non Clumping Natural & BiodegradableFeatures and Further Details Pack of 4 This 4 Piece 3. 8 litre packs of silica cat litter is super absorbent, non clumping and non tracking. Cats can be fussy with their toilet habits and will refuse to use tray they are unhappy with. This litter draws in and locks away moisture to control any odours. It contains tiny pores which absorb the moisture and reduces bacterial growth. Each bag has 3. 8 litres of silica cat litter which helps to contain mess