CAMELBAK CLASSIC LIGHT 4L Blue/Black Hydration Bag

No unnecessary bulk with this Classic Light hydration baghydration bag, manufactured by CAMELBAK for speed enthusiasts!

Made from robust nylon, this model features the Air Support anatomical back panel and ventilated mesh shoulder straps for maximum breathability.

There's a 2-liter storage compartment and a 2-liter Crux water pocket. Only a small zippered pocket holds the essentials, the ultimate compromise for sportsmen and women who want to improve their performance without burdening themselves with superfluous accessories. The bag also features a helmet attachment, chest strap and reflective back logo.

It doesn't get much lighter than this.