Even the small version offers enough space for a spare tube, repair kit or rain jacket, whereas the larger model with 4.1L almost replaces a backpack. It functions at the same time as kind of protection against mud and water spray.Both models feature highly luminescent reflectors and daisy chains for fixing a rear light. The roll closure is secured to the sides with buckles.The mounting set is available as accessory for a second bike.Size 1.6LSpecification:Fabric: PS21/PS21RHeight: 12cmWidth: 16cmDepth: 19cmVolume: 1.6LWeight: 220gSize 4.1LSpecification:Fabric: PS21/PS21RHeight: 14cmWidth: 21cmDepth: 28cmVolume: 4.1LWeight: 260g