This is a 5' x 5' pre-cut piece of 8oz Geo-Cushion
Geo-Cushion is an 1/8" thick (approximate) thick pad that is placed on the ground before your pond liner is installed. It acts as a barrier to protect your pnd liner against punctures from rough surfaces on the ground (rocks, dirt clods, sticks, etc.) NOTE: You should make every effort to prepare the ground to reduce/eliminate all sharp objects prior to installing any pond liner (with or wwithout the use of an underlayment).
Please contact us if you have any questions on how to calculate the size your project requires.