Soft sherpa fabric for enhanced comfort Fabric folds over as a blanket to keep little riders warm Liner lays securely over wagon Designed for compatible use with 5-point safety harness on wagon: simply slide the buckles through the slits in the liner Machine washable for easy cleaning Compatible with the following wagon models: Build-A-WagonA(R): Stroll 'N Wagon(TM), 3971, 3972, 3972W, 3973, 3974, 3976, 3977, 3978