INFLATING POWER OF DOWN/FEATHER FILLING For this down jacket filled 75/25, the inflating power of the down/feather is guaranteed to be greater than or equal to 540 CUIN. The fill power is a measure of the down's thermal insulation capacity and its potential to "trap" air. Down with higher fill power takes up more space, trapping more air and providing greater thermal insulation.
THE ADVANTAGES OF DUCK DOWN AND FEATHER FILLING (FOR THE BACK AND FRONT OF THE DOWN JACKET) The durable and inflating properties of down give this jacket 3 qualities for hiking: - Thermal insulation thanks to the air trapped in the down and feathers - Ultra low weight: down is lighter than synthetic wadding while offering the same degree of warmth. This allows you to lighten the load in your backpack - Ultra compactable* Our feathers come from Chinese ducks reared for their meat, we remove their feathers after slaughter. We hold the death certificates for these ducks.
THE ADVANTAGES OF SYNTHETIC DOWN FILLING (FOR THE ARMS, SIDES AND HOOD) Synthetic down (wadded) filling provides an appealing alternative to feather down: - it provides good thermal insulation even when wet - it provides a little breathability and may be recommended for dynamic activity (down is recommended for static or moderate activity)
IN CASE OF RAIN The material of the quilted jacket is water repellent. It allows drops of water to slide off the fabric which delays penetration of water into the jacket while you get out of the rain. But the down jacket is not waterproof. We therefore recommend wearing a waterproof jacket over the down jacket in the event of prolonged exposure to rain.