The TOTO Soft Close non slamming, slow close elongated toilet seat and lid is the latest in innovative smart seat technology. Constructed of solid, high-impact plastic, this unique seat is specifically designed to reduce injury and to eliminate annoying “toilet seat slam.” the seat and lid utilize a built-in Soft Close hinge system, which lowers the seat and lid down to the bowl gently and quietly. The engineering of Soft Close incorporates toto's high standard of quality and consumer ease. Top tightening mounting bolts ensure easy and secure installation. The seat couples well with TOTO T40 Wash let+ bowls in order to conceal the Wash let+ channel. All mounting and installation hardware for the Soft Close seat is included, along with easy to follow installation instructions and care and maintenance guidelines.