Ortlieb Atrack Hydration-system

"If you have a helmet with you for your outdooractivities, the question arises: Where do you put it when you're not wearing it? The Attachment Kit for Helmets has two answers: Firstly, a universal holder for helmets and other equipment that you can simply attach to your rucksack. Secondly, a toggle-shaped holder that is particularly suitable for helmets with large ventilation openings, which you can attach to the fastening strap or daisy chain. This would elegantly solve the helmetquestion, wouldn't it?"