Sea to Summit Ascent AcII

The relaxed mummy shape is slightly wider through the shoulders and hips, giving you more room to shift positions or sleep on your side without feeling constricted. It maintains thermal efficiency by keeping the bag close enough to your body to trap heat effectively while eliminating the tight, restrictive feel of traditional technical bags.

Yes. The Free-Flow Zip System allows you to unzip the bag completely, turning it into a flat quilt for warmer nights or when you want to drape it over yourself. This versatility makes it a great option for shoulder-season trips where temperatures can fluctuate.

Ultra-Dry Down is a water-repellent treatment applied to the goose down feathers. It helps the insulation retain its loft and warmth if it gets damp from condensation or humid conditions, which is crucial for maintaining thermal performance in the backcountry.

With a temperature rating of 30 degrees Fahrenheit, this is a solid 3-season bag. It is well-suited for spring, summer, and early autumn, but if you are camping in late autumn where temperatures consistently drop near or below freezing, you may want to pair it with a high-R-value sleeping pad or consider a warmer bag.

Yes, the Ascent AcII features a zip coupling system that allows you to join it with other compatible Sea to Summit bags. This is a convenient feature for couples who want to share warmth or simply have more space while sleeping.

The bag compresses down to a volume of 5.5 liters, which is quite compact for a 3-season down bag. It comes with a compression sack, making it easy to stow inside your pack without taking up excessive room.