Vango venom 400 sleeping bag the popular venom sleeping bag has been upgraded to hydrophobic down with a high performing 700 fill power ideal for both wet and dry conditions this sleeping bag is ideal for those seeking maximum warmth with minimal weight and pack size for year round adventure recommended by the duke of edinburghs award and the scout association more info box wall construction down filling is contained in box shaped baffles for maximum loft and to maintain an even dis