Being “portable” means you really do not have to do anything permanent to enjoy an EZ pool. It can be placed right on top of the ground, grass, asphalt, concrete or any combination thereof. In the case of Karen Bridgewater, they just wanted a durable pool for a few weeks out of the year, so when their grandkids came to visit, they had a place to play, be safe and be cool. So every year for the past 6 years, that has been the case.