SUGOi Apparel Size Chart The RS Pro Short is built for long days in the saddle. Its multi fabric construction has impeccable comfort and fit, and is anchored by a 3D Formula FX chamois design. Strategic fabric placement increases aerodynamics and breathability. Features: - Ultra Aero fabric on outer thighs for maximum aero efficiency - Engineered fabric on front panels for increased breathability - Invisa Chamois eliminates stitch lines around the chamois for a flattering silhouette - Updated Formula FX chamois with Poron foam at sit bone area for better performance - Infused silicone gripper leg band for a clean, smooth fit - UPF 50+ - 8.5" inseam - Fabric: Firo (78% Nylon 22% Spandex)