Gen 2 use a press fit end cap

ELEMNT ROAM 3 bike computer

well-ventilated AIR PAD back padding

They are tough

Osprey Berm 4 Pack - Black - 4L Pack - 2.5L Bladder PDP|Option Gen 2 use a pressA versatile volume for any ride, this streamlined bike hydration pack keeps water close, essentials secure and comfort high. Featuring an included, low profile Hydraulics LS 2. 5L Reservoir, magnetic bite valve, front shove it pocket for extra gear, built in tool organisation and an AirScape backpanel that provides close to body ventilation. Features Separate reservoir compartment with easy access S shaped zipper Included Hydraulics LS 2. 5 L