The TriRig Signature Open Back Arm Cups deliver a high-performance blend of comfort, adjustability, and affordability. Made from lightweight ThermoPlast material, these cups weigh just 275 grams per set and provide excellent durability and strength for long days in the aero position. A textured neoprene pad offers a secure, cushioned platform to keep you comfortable and stable, while the open-back design increases arm wrap and ergonomic support. With multiple mounting points and slotted bolt holes, they fit most aerobars on the market and allow a wide range of adjustments to dial in your ideal setup. The Signature Open Back Arm Cups are a versatile upgrade for triathletes and time trialists looking to improve comfort without adding bulk.