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Ascent Down Sleeping Bag (-4°C, -10°C & -18°C)

€449,95 €314,96
Light and compact + three-zipper system for ventilation+ View tech specs
  • Temp Rating
  • Size
You can add a maximum of 20 units of this product to your cart.

BEST USE: Backpacking


WEIGHT: 2lbs 6.8oz |1100g


Shipping & Returns

We use climate-neutral shipping with DHL GoGreen.

For orders with a value below 75€ we charge a shipping fee of 4,95€. We do not charge shipping fees for orders with a value over 75€.

All orders received by 12:00 noon on weekdays are usually shipped the same day. Later orders are usually dispatched the following working day.

Delivery time can take up to three working days Germany-wide and up to four working days for orders outside of Germany, and depends on the shipping service provider.

All orders can be returned within 14 days of purchase. However, for the sake of the environment, please make sure to keep returns as low as possible.

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-4 °C || Ascent Down Sleeping Bag
Ascent Down Sleeping Bag (-4°C, -10°C & -18°C)
€449,95 €314,96
Description || Ascent Down Sleeping Bag


The Ascent down mummy sleeping bag redefines the meaning of versatile. Complex construction and high-quality down keep you warm when it's cold outside, while the triple-zipper Free-Flow Zip system ensures you stay cool and ventilated when the weather warms.

Shaped to allow a natural sleeping position for comfort, while light and compact enough to go anywhere.

Tech specs

  • Best Use
  • Comes With
    Ultra-Sil compression bag and storage cell
  • Insulation
    Ultra-Dry Down 750+ Loft
  • Shape
    Relaxed Mummy
  • Shell Fabric
    Lightweight 20D Nylon Shell
  • Zip Options
    Free-Flow zipper system
-4°C Regular-4°C Long-10°C Regular-10°C Long-18°C Regular-18°C Long

Technical Features

Non-PFC Treatment

Design Details

Frequently Asked questions

Warm enough for cold-weather use?

Yes. The high-lofting down, technical hood, oversized draft tubes, and draft collar make the Ascent 25°F and 15°F true 2.5 – 3 season bags. For colder weather, you might choose the Ascent 0°F and pair it with a greater than 3.5 R-Value sleeping mat like the Comfort Light Insulated.

Really cool in summer temperatures?

Yes. The Free-Flow Zip system means separate zippers on your left and right side and in the foot box. Open them for ventilation or to turn the Ascent into a comforter.

Able to be zipped to another sleeping bag?

The main side zipper can be zipped to the Sea to Summit Women’s Altitude, Journey and Venture sleeping bags. The Ascent Regular and Long bags have the same side zipper length.

You have more questions?

Check out our FAQ page HERE and discover even more answers about our products.

Customer Reviews

Based on 40 reviews (Reviews from global Sea to Summit websites) Write a review