Sea to Summit Ascent Women's Down Sleeping Bag, 30°F, Regular – Three-Season Comfort

Three-season versatility with a women’s-specific design

Meet the Sea to Summit Ascent Women’s Down Sleeping Bag, a true three-season ally for backcountry nights. Built around RDS-certified 750+ fill power goose down and treated with Ultra-Dry Down, this bag aims to stay drier in damp conditions while delivering soft, lofted warmth. The lightweight 20D recycled nylon shell with a non-PFC DWR finish paired with a 20D liner creates a breathable, snug cocoon you can rely on from cool spring evenings to crisp autumn mornings and the shoulder-season window in between.

The standout Free Flow Zip System isn’t just about ventilation: it delivers flexible temperature control and multiple configurations. Zip up for full warmth on cooler nights, partially unzip for airflow, or unzip completely to use the bag as a quilt on extra-warm nights. For backpackers and campers who face shifting conditions, this design offers practical choice without adding complexity.

Designed for women, built for comfort

The Ascent features a women-specific cut that’s narrower at the shoulders to reduce bulk, while offering more space between the hips and knees to support a natural side-sleeping position. An anatomical footbox concentrates warmth where it’s often needed most, and vertical torso baffling helps minimize down shift, helping you stay cozy through the night without constant adjustments.

• RDS-certified 750+ fill goose down with Ultra-Dry Down treatment helps maintain loft in damp environments.
• Free Flow Zip System delivers adaptable temperature control and multiple sleeping configurations.
• Women's-specific cut reduces shoulder bulk and supports a natural side-sleeping posture.
• Anatomical footbox and vertical torso baffles improve warmth retention and down stability.
• 20D recycled nylon shell with non-PFC DWR and 20D liner; box-baffle construction for even loft.
• Durable design backed by Sea to Summit’s Lifetime Guarantee.

In practice, you’ll notice a soft liner that glides over skin, a hood you can cinch with ease, and zippers that glide smoothly. The combination of materials and construction aims to balance warmth, breathability, and durability so you can focus on the moment—whether you’re listening to a forest breeze or sharing a starry night with fellow hikers.

Real-world uses

From alpine approaches to basecamp nights, this sleeping bag is built to adapt. The design enables targeted ventilation when needed and maintains loft where it matters most, all while remaining relatively light and compact for backpackers who value efficiency on trail days and camp days alike.