KUIU’s Quixdown® is a premium goose down insulation that goes through a proprietary cleaning process, and then treated with a durable water repellent (DWR) to each plume of down, making it nearly impervious to water.
It’s the highest quality down available, resistant to water, and will maintain insulating loft even if it gets wet. Down has the highest warmth-to-weight ratio of any insulation, now with Quixdown you can tackle the toughest and wettest mountain hunts without the fear of your down wetting out.
The down is refined and processed by Kawada Feather in Japan. Their proprietary techniques perfect the down to a remarkable high-loft 850+ fill power and 95:5 down-to-feather ratio. Once cleaned, the down is treated with Toray’s DWR, making it resist wetout far better than our competitor’s water-resistant down.
The International Down and Feather Laboratory (IDFL), based in Salt Lake City, UT is the world’s largest and foremost authority on testing down for loft, fill power, down percentage, and DWR.
When in the market for a new down product, it’s important to look for performance that’s backed up by a reputable third-party source, rather than relying on marketing claims alone.This testing keeps everyone honest. All Quixdown used in KUIU’s products is tested and certified by the IDFL.
In this video, the IDFL explains the Hydrophobic Shake Test, its importance, and its benefits. In a real-world technology test, two jars are filled with down and water, and are shaken to test their ability to repel water over time.
In the tests performed by the IDFL, Quixdown and two industry leading DWR treated downs were tested for their ability to repel water. Competitor A became saturated in 94 minutes and Competitor B became saturated in 304 minutes. After 1000 minutes, Quixdown showed no signs of saturation.
Ranking as KUIU’s lightest down, Super Down ULTRA is designed with a mid-layer fit. It’s the ideal insulating mid layer under rain gear, or as a standalone jacket or pant when brush-busting durability isn’t required.
WEIGHT: 6.4 oz / 181 g
PROTECTION: Water-Resistant, Wind-Resistant, Insulated
MATERIAL: 12D Stunner Stretch, 850+ FP Water-Resistant Quixdown
FIT: Mid-layer Fit
As KUIU’s warmest down, Super Down PRO is for the coldest hunts. It's sized to fit over your base and mid-layers. It's the ideal jacket or pant when temperatures plunge during low-level activity, like glassing or sitting in a stand.
WEIGHT: 12.6 oz / 357 g
MATERIAL: 30D STUNNER STRETCH NYLON, 850+ FP WATER RESISTANT QUIXDOWN
FIT: Outer Layer Fit
CONDITIONS: Extreme Cold
Whether you’re needing an ultralight and packable mid-layer, or the warmest possible outer-layer protection, we offer both. Explore Super Down ULTRA and Super Down PRO.
A lot of companies claim their down is waterproof… but how waterproof is it? Matt Lieber from IDFL pulls back the curtain on the Hydrophobic Shake Test, showing a real 90-minute test pitting KUIU’s Quix Down against a competitor.
What is fill power, and why does it matter? IDFL’s Matt Lieber reveals how a Fill Power test works with real-world tests of KUIU’s Quix Down versus a competitor, and explains why higher fill power is better for high performance and reduced weight.
When buying a down product, it’s hard to know what you’re getting unless you know what industry-standard metrics to look at. Matt Lieber from IDFL has some key specifications he recommends researching to make sure you’re buying a quality down product.