We stock two types of sleeping bags; Duck Down filled and Synthetic filled. The choice is yours but to help, here’s our 15 second sleeping bag guide.Duck Down Filled Bags: Very lightweight, Pack down small, Very efficient. They don’t like getting wet and they are a little more expensive than Synthetic filled bags.Synthetic Filled Bags: Cheaper than Duck Down and you can get them wet. They pack down larger than down filled bags and they are less heat efficient.About Vango Sleeping Bags: The Ultralight models are Synthetic filled, and the Venom models are Down filled. The higher the number at the end the colder temperature you can use it in.All Vango bags are high quality and technically advanced modern day sleeping bags. Either type will guarantee you a comfortable nights sleep for years upon years.Vango Venom 400 (Duck Down)New Design, colour and features.The third warmest bag in the Venom range.Outside Temprature Comfort levels: 2°C Comfort, -4°C Lower Limit, -20°C Extreme limitDesigned for serious adventures and technically a very advanced sleeping bag.Box Wall Construction so the Down is contained in compartments inside the bag, known as baffles. Box shaped baffles allow down to loft up to its full potential and prevent it from moving around the bag keeping even coverage of insulation from head to toeMiddle layer material has tiny heat reflective aluminium dots to keep heat in.Features the Vango Thermal Embrace system, the inner lining is and comfortable and slightly elasticised material which gently hugs your body and removes air pockets which are costly for your body to heat.Down is the highest performing insulation featuring the best loft to weight ratio. The fill of the Vango duck down consists of 90% down, 10% support feathers with a fill power of 700 to ensure a high loft, a warm bag and long life. Also features a hydro barrierConstructed from durable 30D Ripstop Nylon.Full draw string hood and shoulder baffles.2 way auto lock zip with Anti Catch piping to prevent zip snagging.Features a Internal pocket for smartphones, mp3 players, headphones.Arrow Foot gives a shaped foot area allowing feet to relax into their natural position whilst sleeping without adding excess space in bagPacks into a waterproof compression sack.Specification:Packed Size: 30 x 15 x 15 cmWeight:1kgTemperature Range Recommended: -4° to 20°cOutside Temprature Comfort levels: 2°C Comfort, -4°C Lower Limit, -20°C Extreme limitPerformance: 3 seasonsDimensions: 205 x 78 x 58cmMax user hight: 190cmFill Material: Duck Down 90% Down 10% Support FeathersFill Weight: 400gZip Side: All Vango bags are zipped on the LeftMaterial: 30D Ripstop Nylon Shell.Colour: Only manufactured in Virmillion (Orange)Bags in stock: Ultralite 1300. 900, 600, 350. Venom 600, 400, 200Upgrade the seasons and temperature ratings of this bag as and when you need to by buying a sleeping bag liner. We stock what many regard as the best sleeping bag liners around direct from Sea To Summit, the compact lightweight Thermolite Reactor, Reactor Plus and Reactor Extreme.If you need help or advise about any of our products please just call or email, our team are always here to help.Here at Twistmoto we specialise in lightweight travel gear for adventure, touring and rallying motorcyclists. Please see our main store www.twistmoto.co.uk or our eBay store for more.