Combines the Soft Cushion of Polyfoam with the Firm quotno bottomingquot Trait of Polyethylene!nbspPerfect for young tumblers in their beginner or intermediate stages.nbsp The Expando Nova Duo Mat offers a 1quot layer of polyfoam which provides the softness for younger, lightweight children, while a firmer 1 38quot polyethylene layer keeps the mat from quotbottoming outquot during more extensive use.nbsp Nylon reinforced tough 18 oz. vinyl cover uses double reinforced, nylon stitched inverted seams to create a smooth working surface.nbsp Each mat has 2' panels and 2' folds and are lightweight for easy handling and storage. nbspnbsp