Thermarest Corus HD Quilt - Down Blanket

+2°C Comfort Limit (EN13537:2012), 260g of 650+ Fill Power Down (US Method)
Weighs 630g (Regular size)
Code: SS16189V
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The Corus HD Quilt is Thermarest's most technical down quilt. It's extremely lightweight, warm, compressible and comfortable. Built for the backcountry travel.

Thermarest says: 

The ultralight Corus HD Quilt offers unprecedented comfort wherever you use it. It's ideal for minimalist backcountry travel from spring through early fall, and versatile enough for hut-to-hut traverses and car camping in any season. Made with high loft, packable Nikwax Hydrophobic Down and ThermaCapture seams for retaining heat and excellent temperature regulation, the Corus offers a surprisingly liberating feeling of unrestricted movement throughout the night. It will leave you wondering how you got along without one.

Nikwax Hydrophobic Down

Used in all Therm-a-Rest 3 and 4-season sleeping bags. Nikwax Hydrophobic Down absorbs 40% less moisture than untreated down. This keeps you warmer over a greater range of conditions, and allows it to dry and restore performance faster. And since all water-resistant down treatments wash out over time, Nikwax Hydrophobic Down is specially formulated to be easily retreated at home using Nikwax DownWash and DownProof, ensuring the long-term water-resistance performance of your bag.

In addition, unlike other treated down, Nikwax® Hydrophobic Down is a water-based formula that’s Flourocarbon-free (a.k.a. PFO’s, PFOA’s or PFC’s) and safe for you and the environment. We found this a particularly compelling reason to go with Nikwax, as questions are increasingly raised about the long-term effects of these chemicals and their persistence in our bodies and the environment.

Sleeping Bags

Applied to the backside of the inner lining material of our sleeping bags, ThermaCapture not only boosts warmth without the added weight or bulk of additional fill material, creating a lighter overall bag, but it also lets you warm-up faster – a real plus on a cold night

The Corus HD is ideal for those seeking ultralight performance and amazing comfort without a weight penalty. It delivers the most warmth per gram of any Therm-a-Rest quilt or blanket and features 650 fill of Nikwax Hydrophobic down which vastly improves its performance in damp conditions.

The elasticized footbox snaps round the bottom end of your sleeping mat keeping your feet warm and the quilt in place. It also includes snap loops so it can easily be connected to a Thermarest mattress, quilt blanket or sheet allowing you to build a your own sleep system. If your after a little bit of luxury on your next adventure then this quilt would be ideal.

The Corus Quilt has replaced Thermarest's Auriga Quilt. They both have very similar features with a small difference in fill power. As they are very similar, we have attached a few product reviews of the Auriga Quilt. See below.

- Reviewed by Ultralight Outdoor Gear

Read reviews here:     
Help and advice:Choosing a sleeping bag adviceEN 13537 rating for sleeping bags explainedAll about down filling in sleeping bags
Sleeping bag shape and sizes adviceSleeping Bag features Page 1Sleepin bag features page 2
  • Compact: Lightweight, 650-fill Nikwax Hydrophobic Down packs small.
  • Added Warmth: ThermaCapture™ seams help retain radiant heat for added warmth.
  • Draft Protection: Full-perimeter side baffles.
  • Secure: Elasticized, insulated footbox keeps feet warm and keeps your quilt in place.
  • Build a System: Perimeter snap loops and included loop kit mate with another Therm-a-Rest mattress, quilt, sleeping bag, blanket or sheet.
  • Includes external snap pocket, stuffsack and compartmental storage sack.


  • Dimensions: 196 x 117cm, (foot 46cm)
  • Fits up to: 183cm
  • Fabric: 20D Polyester Ripstop w/ DWR
  • Fill: 650+ fill Nikwax hydrophobic down w/ Thermacapture seams
  • Fill weight: 260g
  • Pack size: 15 x 23cm
  • Comfort rating: 7C
  • Comfort Limit: 2C
  • Weighs 630g


  • Dimensions: 203 x 127cm, (foot 53cm)
  • Fits up to: 193cm
  • Fabric: 20D Polyester Ripstop w/ DWR
  • Fill: 650+ fill Nikwax hydrophobic down w/ Thermacapture seams
  • Fill weight: 300g
  • Pack size: 15 x 23cm
  • Comfort rating: 7C
  • Comfort Limit: 2C
  • Weighs 674g
Showing our 1 review for Thermarest Corus HD Quilt - Down Blanket. Write a review ›
Review Summary - 5 out of 5 based on 1 rating.
February 14, 2017 | Bob Phillips
Blanquilt, not backless sleeping bag...

I have one of these... Your two review referrals suggest very opposing views. I am no convertee as such, using bags and quilts, interchanging whenever the fancy takes me. This Corus quilt though very nearly ticks all the boxes, and if I were to eschew bags ongoing I would be very happy with my T-rest quilt/blanket. Use it with more clothing (a minus 5c rated down jacket and down socks with merino leggings gets me to coldest general UK winter temperatures barring a Scottish minus 15 night in a storm!). Just base layers and it's good to +3 or 4, and used 'open' you won't break out into a sweat till it hits +double figures at night. It truly is far more versatile than just a bag. I have read of the various ways of attaching it to sleep mats - I barely do, and certainly don't slip the toe end elasticated part under the mat, just let my feet and toes spread out under it on top of the mat. I use 2 shock cords under the mat, usually only use the upper body one on very cold nights, and use those tiny accessory 'biners so it unclips in seconds for exit/entry. The popper at neck level allows you to snug it behind the shoulders and the amount of elastication here is perfect, not at all tight, very cozy. I slip another wee shock cord on here and around my pillow to hold it in place. If you really want to use a sheet, this works any way you look at it. The 650 fill power barely notices (if you're used to 900+ as some of us are) and it's stitched-through, but although the Nemo quilt is rated 3 degrees lower and weighs about 100gm less just look at the price difference! This has had a lot of thought put into it and I love it. I use PHD kit mostly, love the loft and warmth, but for versatility, warmth for weight, thoughtful design, COST and sheer yumminess, buy this little beauty.