The Deuter Spectro AC 2SL is a superlight, well ventilated pack with a women's specific fit and a specially shaped hip belt and shoulder straps. It is hydration compatible and features Deuter's Air Comfort Flexlite System. It also has a front access zipper, a wet gear pocket and side mesh pockets. Volume: 28 litres. Weight: 1.06kgGLOSSARY - AirComfort Flexlite System: Combines flexible twin frame construction, 3-sided ventilation and lightweight materials.