High-performance road/MTB seat supporting racing cycling position.The large central hole relieves pressure, thus improving blood flow and relieving the lumbar spine.Dimensions: 145 x 265 (BSD-141) and 155 x 265 mm (BSD-142) and 165 x 265 mm (BSD-143). Unisex seat.Weight from: 278 g.Lightweight hollow CrMo skins with adjustable scale.Carbon reinforced skeleton.Super lightweight, ultra high density foam for proper support on long rides.Durable synthetic surface.Waterproof.