The Rab Ascent 500 is a midweight bag that is filled with 650 fill power duck down suitable for three season use. Duck down is not quite as fine as goose down and so does not loft quite as much, so more down is required to achieve the same warmth ratings as goose down. Rab Ascent bags have been designed to be wider than other mummy style bags right through to the foot box, making them ideal for larger people or for general use where weight is less important than a comfortable nights sleep.
Trapezoidal baffles are narrower on the inside of the bag simply because there is more fabric on the outside, this helps the even distribution of the down. The hood as a drawcord that extends through the internal collar ensuring warmth is retained and is essential in cold weather. The Ascent has a Â¾ coil zip with a webbing tape running parallel to prevent the fabric from getting snagged. There is also an internal stash pocket, ideal for keeping a few valuables in while you sleep.
Pertex Microlight is used throughout Ascent series of bags. It is a light water resistant fabric with a tight weave ensuring it is downproof. It's light nature also allows the down to loft to it's maximum potential without effecting it's durability. Hydrophobic down is used to provide better performance in damp conditions. This is achieved by washing in a Nikwax coating in the early stages of production. This down is NOT waterproof, but will retain its loft for longer if it gets damp, and will dry faster.
For more information please read Down Fill Power Explained.
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