CamelBak Classic Features: Featuring external fill, this entry-level system offers athletes a great value. The CamelBak® Classic’s low-profile design and minimalist storage options support multi-sport activities or performance cycling. # External fill, OMEGA™ HydroTanium™ Reservoir with Lifetime Warranty # Insulation to keep liquid cool for hours # Low-profile design won’t interfere with helmet # External zip pocket and bungee cinch system for gear storage # Soft mesh harness and slit-mesh back panel for comfort and breathability # Reflectivity improves low-light visibility # 430 mm x 190 mm x 50 mm # Capacity: 2 litres (70 oz) # Dimensions: 16.9 in x 7.5 in x 2 in # Weight Filled: 2.44 kg (5.37 lbs) # Weight Empty: .44 kg (.97 lbs)