An excellent pack and tool for big adventures on an e-mountain bike, designed for a full day in the field. Extra weight of batteries and tools including fuel and supplies for the human accommodated with ease. External hydration interface works quite well, internal hydration can accomodate 2L bladder, a 3l seems to be a stretch. Only quibble is with instruction manual - font is too small to be legible and background color (dark brown) makes black font disappear, would appreciate a link to an on-line version. Incredibly smart / well designed / well functioning pack, perfect for big e-mtn bike expeditions.