Dakine Unisex Electric Mint Session 8L Hydration One Size Bike Backpack - 10000478-ELECTRICMINT. The Session 8L bike hydration pack is a minimalist yet full-featured pack combining the cooling comfort of a breathable back panel with airy shoulder straps. This narrow lightweight pack features a 2-liter vertical hydration reservoir with a bite valve. The pack offers plenty of storage including an organized front pocket a fleece-lined sunglass pocket additional side pockets plus external attachment straps. The Session is a do-it-all bike pack to keep you out all day on the trails. Limited Lifetime Warranty 2L / 70oz Hydrapak® reservoir Phaser bite valve Breathable Air Flow backpanel and shoulder straps External attachment straps Fleece lined sunglass pocket Internal organizer pockets Safety light attachment Integrated rescue whistle / sternum strap