One of CamelBak's most trusted and well known minimalist packs, the Camelbak ThermoBak 3L continues to impress with updated features and technology. The new 3L, 100oz Mil Spec Crux Reservoir delivers 25% more water per sip while the style maintains the ergonomics and optimal infrared reflectivity it's famous for.KEY FEATURESExternal fill allows for easy access to the Crux™ reservoir for easy filling, cleaning and ice addition.Two-zipper fill cover provides top or bottom of reservoir compartment entry points.Adjustable sternum strapQuick-release shoulder straps unclip for easy removal and stow away inside built-in pocket.Hook-and-loop strap management.Fully insulated reservoir compartment using 5 mm closed cell foam ... More info