PRISM - Material made of polymeric matrix composite reinforced with ultra-resistant glass fiber. - A practical and ergonomic side introduction ideal for small frames or a small and compact container transport space. - PRISM Right and PRISM Left actually each have their own opening to the right or left when they are mounted on the frame downtube but the bottle insertion side may change when they are mounted on the bike main tube , the seat tube. - Ideal in extreme conditions, such as high speed descents, rough roads and off-road routes