Cypress Gore Infinium

$1,310.00 - $1,355.00


Wide-cut, windproof and highly water-resistant -30° F bag.

Until the Western Mountaineering Cypress Gore Infinium came along, most sleeping bags designed for extreme cold had been narrow mummy bags. The -30° F sleeping bag is incredibly wide, with more insulation and girth than any other bag in its warmth range. Even though this is not a mummy bag, it is absolutely capable of keeping you warm in severe cold. With an average loft of 11 in. and packed with a whopping 50 ounces of down, this bag will completely envelop your body with a thick barrier of the best thermal protection available, Western's 850+ fill premium goose down. Features include a stout insulated draft tube inside the zipper combined with a second storm flap covering the outside of the zipper, a full Gore Infinium water-resistant/breathable shell, a three-dimensional insulated draft collar, and a second zipper allowing the bag to open up completely around the foot.

Like all Western Mountaineering sleeping bags, the Cypress is made by hand in San Jose, California. Their down is sourced from free-range mother geese who are never live-plucked or force-fed.


The GORE-TEX INFINIUM™ WINDSTOPPER® series enhances quality and performance, combining versatile aspects of support and comfort without the need for total waterproof protection. Durable water resistance combined with increased breathability, better packability, and optimized lightweight elements are the defining features of this technology. GORE-TEX INFINIUM™ WINDSTOPPER® is totally windproof and provides highly water-resistant protection for unstoppable performance.


Brand Name:
Western Mountaineering
Sage / Black
Bag Style:
Seasonal Usage:
Four Season
Temp Rating:
-30º F
Temp Rating Celsius:
-34° C
850+ fill goose down
Bag Shell Material:
GORE-TEX INFINIUM™ WINDSTOPPER®: windproof, virtually waterproof, and breathable
Bag Loft:
11+ inches
4 lbs. 14 oz. (Average total weight)
Fill Weight:
50 oz
Bag Length:
Reg: 6 ft / Long: 6 ft 6 in
Circumference at Chest:
Reg & Long: 69 in.
Circumference at Hips:
Reg & Long: 61 in.
Circumference at Foot:
Reg & Long: 48 in.
Made In:
Other Features:
  • Adjustable down-filled collar completely surrounds your neck for maximum heat retention
  • Well-insulated draft tube behind zipper means zero cold spots
  • Storm Flap provides external zipper protection
  • Sideblock Baffle Construction keeps the down where it belongs
  • Dual Zippers allow bag to open completely around the foot and lay flat
  • Footbox made of abrasion-resistant taffeta, a more durable fabric woven with heavier yarns so the inside of your bag is protected when you store gear or boot liners at the foot of your bag
  • Stiffening tape along zippers to prevent snags
  • Recommended Accessories