Dimensions are the same as the OEM seat: shapes, holes and quality are on point., The complete seat is composed by plastic bottom (polypropylene) and seat foam standard height (or +15mm). The Blackbird Racing foams are made of the best quality rigid polyurethane foam. They are produced using a chemical formula created for aerospace implementation. Thanks to the molecules with closed cells it weighs less than the original OEM foam and the material is more waterproof., The cover has a good water resistance but it isn't completely watertight. The thread used for the seams is waterproof and rubbing-resistant., Created on the basis of the latest requests of the race teams using the best non-slip materials, it gives to the rider an excellent control in the driving. Non-slip effect and technical characteristics focused on the off-road use., Patch is made by microinjection for a long lasting and wearproof use., Only the best materials on the market are used to provide a valuable and high quality product.