Travertine, as a sedimentary rock, presents on its surface hundreds of tiny voids or holes undetectable to the naked eye. The high porosity of Travertine allows the absorption of water. Travertine may also contain small holes and this feature makes travertine a permeable product. Its permeability is the main reason why many builders, landscapers, architects, and designers choose travertine for outdoor projects. When used on a pool deck, travertine pavers provide a non-slip surface as laboratory test results show that travertine pavers, when wet, are less slippery than when they are dry. Travertine Mart”s Premium Select Grade travertine pavers provide the perfect balance in functionality and density; creating a porous and slightly rough non-slip surface with a density that can go through even freeze/thaw cycles without cracking or deformations.