Thule Rail Backpack 18L

"The Rail Backpack 18L from Thule is the perfect companion for all cyclists who are on an adventure. This innovative backpack offers a special, stabilized pocket that provides space for a spare battery (up to 410x100x100mm) so you can enjoy your ride without interruption. The removable and lightweight Koroyd Level 1 back protector effectively protects the lower back and spine from impacts and injuries, which is particularly beneficial on demanding downhill rides."
"Thanks to the practical ReTrakt tube retrieval system, you can drink while riding without having to stop. The integrated HydraPak 2.5-liter hydration bladder with sliding closure makes cleaning easy and prevents leakage thanks to the bypass valve. The backpack offers a secure hold, even when jumping, and keeps your equipment dry even in bad weather with the rain cover supplied."
"With special inner pockets, you can keep tools, pumps, snacks and accessories perfectly organized. Double- and patch pockets provide additional storage space for small items and allow quick access to provisions, cell phone or tools without having to take the backpack off. The breathable Air-Mesh-Ru00fccken section prevents heat build-up, while reflective elements and a light attachment loop ensure increased visibility. Store your jacket or additional clothing in the front u201eShove-itu201c pocket and stay flexible on any tour."