Thermarest Parsec 20F/-6C Down Sleeping Bag

The Thermarest Parsec 20F/-6C down sleeping bag owes its performance to weight value to its strategically zoned premium 900-fill Muscovy hydrophobic down insulation.

When your plans are ambitious and your sleep is essential, the Thermarest Parsec -6°C will be your new best friend.

Made to deliver ultra lightweight comfort for alpine nights, it is now filled with highly compressible, warm and resilient 900-fill power hydrophobic Muscovy down. 
The soft, durable recycled nylon shell is easier on the planet, while the anti-snag YKK® zipper prevents wear and tear with easy entries and exits. 
The updated baffle structure and zoned insulation strategically locate more down in priority areas, while our down-lined Toe-asis™ foot pocket gives you a place to rapidly warm cold feet. 
Finally, an internal stash pocket holds your phone to preserve battery against the cold or keeps a small water filter from freezing.

•    Recycled Shell & Liner: 100% recycled fabrics are eco-friendly while being lightweight, soft and durable.
•    Ultralight Warmth: Now with premium 900-fill hydrophobic down; RDS-certified and PFAS-free; more down than ever before provides exceptional warmth.
•    Responsible Down Standard: RDS certification that ensures the waterfowl in the down supply chain are treated humanely.
•    Packable Comfort: 900-fill down provides excellent loft and compression; bag fit is designed for ideal blend of comfort, heat retention and packability.
•    Zoned Insulation: Updated baffle design maximizes warmth and trims weight by concentrating down where you need it most.
•    Toe-asis™ Foot Warmer Pocket: Rapidly heat cold feet with a baffled, ergonomic and insulated pocket in the footbox that helps concentrate warmth.
•    YKK® Anti-Snag Zip: Prevents accidental tears and eases entries and exits.
•    Quilt and Blanket Loops: Customize your sleep system by layering quilts or tech blankets for increased warmth.
•    More Features You’ll Love: Internal stash pocket for small items; cinch hood and draft tubes along zip and neck to retain warmth.
Compression and storage sack included.

Packable Comfort
900-fill power Muscovy down provides exceptional warmth while packing down incredibly small, taking up minimal space in your pack.
Humanely-Sourced Down
PFAS-free hydrophobic down is certified to be sourced from humanely treated waterfowl by the Responsible Down Standard (RDS).
100% Recycled Nylon
Shell and liner are certified 100% recycled by the Global Recycle Standard. Recycled nylon is made of plastic bottles and reduces water and energy waste in the textile supply chain.

Toe-asis™ Foot Warmer Pocket
A baffled, ergonomic and insulated pocket in the footbox helps concentrate warmth and rapidly heats cold feet.
 
Footnote:  Although the Parsec is named 20F/-6C,  when independently tested, the new 2026 version outperformed the previous model of the same name.  The graphics and labels had already been printed, so the new version keeps the same name but has higher specifications.
EN Comfort  29 °F / -1 °C
EN Comfort Limit    18 °F / -8 °C

Muscovy Down:
A New Standard in Sleeping Bag Insulation.

Muscovy down has recently emerged as an exceptional insulation material, thanks to naturally
larger, stronger down clusters for premium loft and durability, and sustainable considerations
throughout the process. It is featured in our updated Parsec™ and Polar Ranger™ sleeping bag
collections. Read on to discover the benefits of Muscovy down.

Higher Thermal Performance
- Thanks to its high loft, larger cluster size and many ‘reverse’ barbs that trap more air, Muscovy down delivers outstanding thermal
insulation, consistently beating goose down in a variety of temperature tests. It traps more air per ounce and can reach up to
950+ fill power.
More Durable, Lofty and Resilient Plumes
- Muscovy down offers stronger, more resilient cluster stems that ensures the loft lasts longer over time. Muscovy ducks’ growth
time is twice as long as other ducks (90-100 days), which leads to superior mature down plumes. Lab testing shows that Muscovy
down holds up better after multiple washes and rebounds from compression faster than goose down. Care instructions for
Muscovy down products are the same as goose down.
Less Internal Shifting
- The clingy structure of Muscovy down, including the reverse barbs, strong stems and generous loft, helps individual clusters cling
to one another, meaning they stay in place better within baffles and panels, reducing shifting and cold spots.
Sustainability
High-Quality Care = High-Quality Down
- Our Muscovy down comes from animals kept in lower-density, free-range environments, meaning healthier birds and higher quality down. Additionally, their down is a by-product of meat production, aligning with responsible sourcing and full-animal use
practices. It is also RDS-certified and processed in a facility that is 76% powered by solar energy.
Patented Ultrasonic Cleaning
- Our Muscovy down is cleaned with ultrasonic technology—a water-based, chemical-free method that uses sound waves to
remove impurities at the microscopic level. This process delivers ultra-clean down (turbidity levels of ≥1500) with improved
hypoallergenic properties while using 20% less water, detergent and energy than traditional methods.

Included in the following 2026 Therm-a-Rest® products:
Parsec™ 20F/-6C (SKUs 14386 & 14387), Parsec™ 0F/-18C, Polar Ranger™ -20F/-30C 

EMS shipping information UK.

All orders placed before 2.45pm Monday to Friday will be shipped the same day.
Orders placed after 2.45pm will be shipped the next business day.
Orders placed after 2.45pm Friday will be shipped on Monday.
No orders are shipped on Weekends or Bank Holidays.

EMS is a Plastic Free Retailer
From 1st June 2019 no new plastic has been used in any order shipments.
We now use recycled craft paper wadding, paper based adhesive tape, card boxes with recycled content and double wall paper bags for all of our order shipments. No new plastic is used at all.
We'll continue to reuse the bubble wrap and other plastic packing materials our suppliers send to us, as reusing is still better than recycling.

Shipping Cost UK - Mainland:

All UK orders with a value of £60.00 or more are delivered FREE via 'Royal Mail 48 Tracked' post and should arrive in three to five working days.

For small orders of £59.99 or less, we charge a very reasonable flat rate of just £5.00 using the same 'Royal Mail Tracked 48' service.

Premium Shipping Service Options:

If you would like your order delivered quickly via a premium service, several options will be available at checkout.

'Royal Mail Tracked 24' costs £8.00 Delivery usually takes one to three working days.

DPD Next Day Courier Service costs £8.00. Your order is tracked and will arrive next Business day.

All UK Mainland orders over £195 are delivered FREE via DPD Next Business Day Courier. (Some Scottish Highland and offshore postcodes may be serviced by an alternative courier and delivery to remote areas may take longer, but the delivery service will still be premium and free of charge).

Shipping UK - Offshore, Highlands, Channel Islands and Northern Ireland:

If your order has a value over £60 then you still qualify for free shipping, but there is not a next business day courier option.  Please allow two to four days for all deliveries. 

The available courier options will be offered at the checkout.

Shipping costs - E.U. and Rest Of World
We no longer ship to destinations outside of the UK.

Out Of Stock Items:

Out of stock items are marked as out of stock on the product page, however on very rare occasions situations beyond our control may result in an item(s) being temporarily unavailable.

For Items that are no longer available, we endeavour to remove from our website as quickly as possible.

You will be contacted by email or telephone concerning any item(s) we are unable to supply. Out of stock items marked to follow will be sent automatically when they become available. We do not make additional charges for this service. In any case, we aim to deliver goods within a maximum time frame of no more than 7 days from receipt of order. If we are unable to do this, you will be contacted to make arrangements for any necessary refund to be issued.

Question: What is the EMS returns policy?
Answer: If you don't like it, send it back for a refund.... no problem!    Please read on for terms and conditions.

In line with current health and safety guidelines, we reserve the right to refuse any items that are (for whatever reason) not returned to us in a clean and hygienic condition.

Goods with manufacturing faults can be returned for a full refund (including delivery and standard return postal charges of up to £7.50) if the item, after later inspection by us, is proven to have been faulty and returned to us within 30 days from the date of purchase.

Please check all goods on arrival to ensure they have not been damaged in transit and report any damaged goods as soon as possible after receipt and within 14 days.

Please email or call and ask us which return service to use, as we can only refund for the service we recommend.

Please note that inflatables such as sleeping mats are not considered as faulty if they become punctured during use and are not covered by the manufacturer's warranty in this event.

If the goods have been supplied as requested but are unwanted, they can be returned within 30 days from the order date for a full refund provided they have not been used and are in a resealable condition with all of the manufacturer's labels and packaging intact.

Items ordered in November or December as Christmas presents can be returned to us at any time in January.
If you would like to exchange for an alternative size, we will supply replacements subject to stock availability. You will have to pay to have the goods sent back to us, but we won’t charge you any shipping for your first replacement item.

All items returned must be unused and with their original labelling and packaging intact (unless faulty).

How To Send Returns.

1). You will need a returns number and a returns address. Please use the 'Contact Us' form from the 'Contact Us' page (found in the footer of this page). Send us your order number and reason for return. We will issue a returns number and returns address for one of our UK warehouses.  (Please Don't ship your returns to our office address in Cheltenham, as we don't keep any stock there and there might not always be someone there to sign for your package).

2). For New and Unused returns, please include all the Manufacturer's Packaging and Labels, otherwise we can't return the item to stock.

3). Carefully pack the product so it survives its journey and send it to the address we provide. We recommend a postal service with a signature on the receipt.

 Payments.

Our 100% secure payment platform accepts all major credit cards & debit cards including American Express and PayPal.

Privacy Payments Policy?

Your orders are sent to us via a Secure Page on our web site. This means that others cannot hack into your credit card details or obtain any other personal information from our order form.

 We know of no documented case of credit card fraud using our shopping system over the Internet.

• All credit card numbers are encrypted in the software when the order is placed using 128-bit encryption.
• They are only decrypted after they reach our computer. They are not held in clear text on any web site.
• Any customer information held on our computers complies with the rules and laws contained within the Data Protection Act 2018.
  
  
• We will keep customer information safe and secure and will not distribute or sell this information to a third party.
• We will not send emails to you unless you have given us your consent, if we are already in involved in dialogue responding to an enquiry, or we think we can be of assistance if you are having problems with our system.

 
 What about on line security?

Any personal information given to EMS will be protected. Your information will not be disclosed to any third parties. Our server will secure your personal information with up-to-date firewall and encryption techniques during the ordering process.

 In order to protect customers to the fullest extent, EMS does not store your credit card information at any time. To assist you in recognizing secure areas of the website, a small lock icon will appear in the lower right-corner of your web browser**. When this icon is present, and in the locked position, you know that information on that page will be secured.

Prices

The prices payable for the items that you order are clearly set out on the web site. All prices are expressed inclusive of any VAT payable unless otherwise stated.

Orders delivered to countries outside of the E.U will have the VAT removed automatically, but you might be liable for import duty depending on your country’s import regulations.

Product information is included on the site and if there is anything that you do not understand, or if you want more information, please contact us by email or telephone.

The content of pages on our site is constantly updated yet may at times be out of date. We accept no responsibility for keeping the information in these pages up to date or liability for not doing so.

Other sites, Advertisements and Links
EMS links to other websites in good faith and we do check these sites before adding a link. However we are not responsible for the privacy policies or content of these websites.