Super Down ULTRA Pant

Incredible warmth at an unbelievable ultralight weight. The full-length side zippers allow quick changing without removing footwear. They’re perfect as an insulating mid-layer or as a standalone hunting pant when brush-busting durability isn’t required. They’re insulated with 1.7 oz of 850+FP TORAY Quixdown, making it KUIU’s lightest down pant.

• 8 oz /227 gm
• Reinforced seat and knees for wear resistance
• K-DWR treated fabric and down—insulates even when wet
• 1.7 oz of Premium 850+FP Polish Goose Down (50% less down than PRO)
• Packable in self-stowing pocket

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SKU # 50022
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  • lifetime warranty on all our gear

Product Overview


The Super Down ULTRA Pants weigh a mere 8 oz. They’re built for the hunter looking for unbelievable warmth-to-weight ratio. They’re perfect as an insulating layer—or as standalone pants when brush-busting durability isn’t required. They’re insulated with 1.7 oz of 850+FP TORAY Quixdown (50% less down than Super Down PRO), making them KUIU’s lightest down pants.

Our Super Down products outperform the competition. We start with the best Polish goose down, which is cleaned, refined and processed by Kawada Feather in Meiwa, Japan. Their proprietary techniques perfect the down to a remarkable 850+ fill power and 95:5 down to feather ratio. Once cleaned, we treat the down with TORAY’s DWR, so each individual cluster is impervious to water; keeping its insulating loft even when wet.

The outer ultralight 12D nylon Stunner Stretch fabric is wind-proof and comfortable. It's heat-treated to keep the down from migrating through the fabric, eliminating the need for noisy down-proof coatings. The fabric is also treated with TORAY K-DWR to repel light rain and snow.

Super Down ULTRA pants compress and self-stow inside their internal pouch. They’re so lightweight, you won’t regret having them in your pack.

• FIT- Insulating mid-layer. Designed to fit close to the body, wear over a base layer and under outerwear
• Face and lining fabric- 12D Stunner Stretch ripstop
• Insulation- water resistant Quixdown 850+ FP
• 30D reinforced paneling at the seat and knees
• 95% down cluster | 5% feather
• IDFL certified (International Down and Feather Laboratory)
• Packable in self-stowing inside pouch
• Hook-and-loop adjustable waist tabs for custom fit
• YKK full-length side zippers
• Inseam: S-30 in | M-31 in | L-3XL-32 in
• Knee articulation built into seams


Quixdown® by Toray

Waterproof Warmth 

Down has the highest warmth-to-weight ratio of any insulation material. The only drawback is that once wet, down stops being effective. Not anymore. Through nanotechnology, Toray Industries has created a water repellent finish for down feathers that makes each down cluster essentially waterproof. Quixdown® stays dry to keep you warmer with less weight and bulk.

Featured in our Superdown Insulation Layers, Sleeping Bags and Glassing Mitt

Technology 2

Stunner® Stretch Fabric by Toray

Lightweight, Stretchable Comfort

Toray develops a new fabric technology and KUIU brings it to Mountain Hunters first! Ultralight, down-proof Stunner Stretch fabrics stretch as you move and put a layer of luxurious comfort between you and the warm softness of KUIU’s premium Polish down. And, of course, Stunner Stretch minimizes bulk and weight.

Featured in our Superdown Products

Technology 3


K DWR® (KUIU Durable Water Resistant)

K-DWR is the first line of defense for keeping you dry. It keeps water from penetrating the outer-layer fabric, which promotes breathability and performance.

Featured in all our Rain Shells, Guide Series, Tiburon Products, Chinook Products Alpine and Attack Pants

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