Simply%20inflate%20the%20tube%20and%20roll%20up%20your%20puzzle%20in%20progress%20on%20the%20felt%20map.%20Mat%20measures%2059%26quot%3B%20x%2039%26quot%3B%20and%20holds%20up%20to%203000%20piece%20puzzle%20(based%20on%20Ravensburger%20dimensions).%20Secure%20it%20with%203%20rubber%20bands%2C%20included.