HAZARD 4 Second Front Rotatable Backpack Backpack version of our Switchback front-to-back sling pack; Thermoform back & easy access when swung to user's chest Multiple modular/MOLLE expansion options; Drop-down organizer/work surface on front with iPad(R) window Hydration back-pocket (for bladders up to 100 Oz./3L); Wide-format & padded carrier fits most 17" laptops EXTERNAL SIZE: 18" L x 11" W x 6.2" D (46 x 28 x 16 cm); WHAT'S INCLUDED: 1x Delta retainer, 1x Sternum strap Main Material: Invista(R) 1000D Cordura