Box wall construction - Down filling is contained in box shaped baffles for maximum loft and to maintain an even distribution of down from head to toeEthically sourced down - Humanely collected down from birds that have not been subject to any unnecessary harmHydro-barrier down - Premium 90/10 700 fill power duck down, stays drier four times longer than untreated downOuter shell fabric - 30 denier mini-ripstop nylon. Lightweight, soft and breathable. Abrasion resistant and durable shell. Water resistant finish repels moisture and protects downLightweight 30 denier mini ripstop nylon lining - Lightweight with a silk feelArrow Foot - Shaped foot area allowing feet to relax into their natural positionOmega shaping - Engineered to position zips and seams in the lower section of the bag. Ergonomically shaped to fit around head and shoulders for improved heat retention3D hood with multi-cord closure - Structured hood design keeps the head and shoulders warmer during the night. The hood's dual cord thicknesses allow easy adjustment in the darkInsulated, adjustable shoulder baffle - Retains heat within the sleeping bag3D insulated zip baffle - Minimises heat loss through the zip. The 3D shape allows the filling to loft and provide insulationFull Length Two-Way Auto-Lock Zip with Zip Guard: Used to seal in warmth or provide ventilation and can be used from inside the bag. Anti-catch piping helps to prevent the zip from snagging on the lining.Internal pocket - Provides convenient storage for small itemsRoll top dry bag - Expel excess air and roll 3 times for a sealed, water tight bagMesh storage sack - Allows down to loft whilst in storage, increasing the lifespan of sleeping bagTemperature ratings independently measured in accordance with EN 13537:2012 - Extensively tested to meet accurate temperature rating standards