The Descente Aero-X Classic Bib Short uses two different deniers of Nylon for advanced moisture management, durability and softness with 16% Spandex content for perfect compression and stretch. An advanced fabric for the world’s most comfortable cycling shorts. Aero-X moisture-management fabric uses dual-denier Nylon plus spandex for great durability, comfort and fit. Flat-seam construction with contrast side seam. Descente’s molded Spectra Chamois; advanced seamless, contoured and stretch construction. D-Vente™ micro-denier mesh bib construction for great support and breathability. New silicone and sublimated logo hem gripper elastic with quad leg hem stitching for a pro look