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Kelty Cosmic Ultra 20 Dridown Womens Sleeping Bag

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The Kelty Women's Cosmic Ultra 20 is the ultimate in a lightweight mummy sleeping bag that balances weight with excellent warmth. Kelty took their top-selling Cosmic Sleeping Bag and added a women’s specific 800 fill DriDown version, with all the great features and perks too.

The new trapezoidal baffle construction ensures that air is trapped in the Dridown improving and retaining heat, and it’s just one of the reasons the Cosmic is Kelty's favourite three-season sleeping bag.

The Cosmic Ultra features a  natural-fit foot box for more comfortable happier feet, and a PFC-free water-repellent coating for a healthier environment.

What makes it a women’s sleeping bag? It’s designed for and tested to women’s specific ISO standards for warmth. Studies show that women temperatures run colder than men during sleep. So, in addition to a design that features narrower shoulders, wider hips and a shorter torso, the Kelty women’s bags have extra insulation in the upper body and foot-box too.


  • Innovative trapezoidal baffle construction = thermal efficiency
  • Premium lightweight 800 fill DriDown
  • Environmental and health friendly C0 and PFC-free DWR fabrics
  • Zippered internal stash pocket for headlamp, cell phone or actual… stash
  • Buttery-soft and durable 20D Nylon shell and liner
  • Zipper draft tube keeps warm air in while anti-snag zipper makes it easy to get in and out
  • Natural fit spacious footbox = more room to wiggle your toes
  • Comes with stuff sack for quick departures


  • Liner: 20D 400T Nylon
  • Shell: 20D 400T Nylon
  • Fill: 800DP DriDown


  • Temperature Rating: 20.0°F / -7.0°C
  • ISO Comfort Rating: 25.0°F / -4.0°C
  • ISO Limit Rating: 13.0°F / -10.0°C
  • ISO Extreme Rating: -21.0°F / -30.0°C
  • Bag Shape: Mummy
  • Weight: 2.95 lbs / 1.34 kg
  • Fill Weight: 24.69 oz / 700.0 g
  • Fits To: 67.72" / 172.0 cm
  • Length: 74.02" / 188.0 cm
  • Shoulder Circumference: 57.87" / 147.0 cm
  • Hip Circumference: 57.87" / 147.0 cm
  • Foot Circumference: 38.19" / 97.0 cm
  • Stuff Sack Size: 8 x 13 in / 20 x 33 cm
Delivery Options

  Standard Delivery

Free Delivery on orders over £30 and £2.95 for orders under £30.

  • Delivery is within 2-4 working days, ordered before 1pm
  • Your order will be delivered by Royal Mail or UK preferred Courier
  • You will be notified when your order is despatched

  Express Delivery

Free Delivery on Orders over £500, £5.95 for orders under £500

  • Delivery is within 1-2 working days, if ordered before 1pm
  • All orders over £500 are eligible for free Express Delivery service
  • A delivery charge of £5.95 applies to purchases under £500
  • Please be aware we only deliver to UK Mainland and Northern Ireland
  • You will be notified when your order is despatched


**Please note we only deliver to the UK and Northern Ireland. We cannot take responsibility for any delivery delays or problems out-with our control caused by the weather or any Delivery company. We will do everything we can to help resolve any delivery issues. You will be responsible for the items as soon as they are delivered. If you wish to cancel an order before it has been dispatched, you should call us on 0131 3807205, or email us at:


    Returns Policy

    Thank you for making a purchase with us at PureMtn.

    If you've changed your mind for any reason about the product you ordered, please contact us with your order number at and we will then provide you with a Returns Number and start your returns process of how and where to send the item/items back to us.

    Provided your item is unused and in original condition within 31 days of order (including all labels, tags, product boxes, accessories and bags intact), you can send the item/items back for a refund or exchange. Please ensure all Returns are carefully packaged as they may be refused if items arrive damaged due to improper packaging.

    If a Refund is requested, we will refund the value of the returned goods (not including the postage) to your original payment method within 7 days after they have been received and checked by our returns team.

    Should, for some reason, you receive a damaged or an incorrect item, then please accept our apologies and contact our Customer Service Team immediately on Tel: 0131 380 7205 to allow us to resolve the problem as quickly as possible.

    Please don’t hesitate to contact our Customer Services team on 0131 380 720 if you have any questions about our returns policy. They are here to help you Monday - Saturday 9.30am - 5pm or email us on:


    Should you choose to return your order and request an exchange, the exchange  will be sent the day after your return has been checked and logged, provided the requested exchange item is in-stock. You will be charged for any additional postage. To ensure you get the item you wish, it will be quicker and simpler to order the new item and send the old one back as a return and request a refund.

    You will receive a refund for any difference in price, if a lower value item has been chosen in exchange (minus the cost of any original shipping charge.

    Kelty Cosmic Ultra 20 Dridown Womens Sleeping Bag

    Kelty Cosmic Ultra 20 Dridown Womens Sleeping Bag

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