Grassy get-a-ways roll-a-nest is an all natural sisal grass hide-out that provides the ideal spot for your pet to play or rest. Each nest is made of natural grass fibers hand-woven onto a sturdy support frame. These natural sisal fibers are safe for your pets to graze and chew upon. Roll-a-nest is perfectly sized for hamsters, gerbils and mice. For added fun, connect critter trail fun-nel tubes directly to your new nest inside any critter trail home and watch the fun begin.