Here's what other sites are saying:
Lighter than a cotton t-shirt but very warm, the Montbell Ultralight Down Vest is amazing. Everyone that picks this vest up is completely shocked by how light and soft it is. It compresses down to the size of a softball and comes with a stuff sack that weighs 6 grams. High quality 800 fill power hypoallergenic goose down provides warmth without weight. The shell is made out of 15-denier Ballist Airlight ripstop nylon that is incredibly soft, light and highly wind resistant. Stretch nylon binding cuffs and full length coil zipper seal out cold air. Hand warmer pockets add comfort. Single-quilt construction reduces weight. DWR finish resists rain and snow.
- CampSaver.com refers to the men's version
The MontBell Men's Ultralight Down Inner Vest packs smaller than your water bottle and weighs five ounces. Carry this down vest along anytime weight and warmth are vital. MontBell stuffed the strong, lightweight nylon shell with 800-fill down, which holds onto your body heat so your core stays warm. Coated with a durable water repellent, this jacket won't lose its loft and warmth in mild precipitation. Wear under a waterproof shell for excellent weather protection. A stuff sack comes with this vest.
- Backcountry.com refers to the men's version
The MontBell U.L. Down Vest is part of the highly refined MontBell Ultra-Light Down Inner series. This family of products delicately balances the characteristics that define reliable ultra-light apparel. For example, the U.L. Down Jacket weighs less than most cotton Tee-shirts, blocks an amazing amount of wind, and is warmer than most heavy fleece jackets, while compressing to the size of a 32 ounces water bottle. Specifically designed as a replacement for the heavy and bulky fleece garments used by many backcountry enthusiasts, the U.L.Down Series is “what you need” when warmth is critical, minimal weight is paramount, and space in your pack is at a premium. Ultralite Down Inner Vest Features: Single-quilt construction for weight reduction Hand warmer pockets 4/5 C Full Zipper Stuff sack included Materials 15-denier Ballistic™ Airlight hollow fiber nylon shell w/DWR treatmentHigh quality 800 fill power hypoallergenic goose down Weight 5.0 oz.(Size M)
- OMCgear refers to the men's version