A: You can use any stretchy material of convenient width and at least 2 feet in length. I recommend using elastic waist band of at least 1/4" to 5/8" width for best results. Cut a piece 2 - 3 feet in length. It can be purchased at most sewing or craft stores. If you do not have any stores in your area, I can sell you a piece for $3.00.
(Shipping is $2.50 in US, more for International destinations. You may add it to your tack order to combine shipping at no extra charge for this item.)