Stay focused during your bike ride with the Thule Vital 8L bike backpack and its hydration system that you can use while riding! Ideal for day trips on weekends, this Thule Vital 8L backpack and its very practical pockets will allow you to easily access your personal belongings without having to stop or remove it. A phenomenal time saver for quick and short outings! The Thule Vital 8L backpack is ultra-light, you might almost forget you're wearing it!