Fuzzbutt has two types of cube - Standard and Luxury Snooze Cubes.

Standard Snooze Cubes have two inner layers of polar fleece plus a lining of polar fleece, and a fleece or cotton outer.
Luxury Snooze Cubes are bigger and thicker than the Standard Cubes with THREE inner layers of padding.  They are better suited to floor-standing, great for guinea pig and small rabbit cages.

Size comparison:
Standard Snooze – 9l” x 6.5″h x 6.5″d
Luxury Snooze – 9.5/10″l x 8h” x 8″d
Luxury Hooj – 11.5″l x 7.5″h x 8.5″d