Kaytee Night-E-Night Nesting Material, 35 Grams Night-E-Night is made from Viscose, a processed form of cellulose. Cellulose is the basic component of all plant cells. Comfy nesting material Contains 35 grams For Gerbils, Hamsters, Rabbits, Rats or Other Small Animals Accommodates your pet's natural instincts to chew, nest and burrow