Interchange Quick Cleats offer easy and secure attachment to most saddle rails. The main opening gusset keeps contents in place. An elastic band on the bottom for a m pump. Reflective elements enhance visibility for maximum safety in any conditions. Strong and lightweight materials hold up to trail and road grime without contaminating contents. 2-litre (120 cu in) capacity - 2.5-litre (150 cu in) capacity when expanded.