Buy Two to start with. You wont regret it!
I love this product because it was critical in helping to get rid of the black flies that sometimes pop up with Guinea pig parenting.  I have two large guinea pigs and they are very active. The liner is durable and easily washed. I recommend getting two right when you first order. You can always have one washing and a new one in the cage.It fits perfectly in the cage I have. Excellent product!
Rating: 5 stars