Thermarest Antares HD Sleeping Bag

-9°C Comfort Limit (EN13537:2012), 440g of 750+ Fill Power Nikwax Hydrophobic Down (US Method)
Weighs 950g
Code: SS15123V
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Thermarest's Antares HD sleeping bag uses a reflective barrier, zoned down filling and mattress straps to create a formidable bag at a very light weight.

Thermarest says:

Featuring Nikwax Hydrophobic Down and a ThermaCapture Lining for advanced, lightweight warmth, the three-season Antares HD can handle just about anything from early spring to late fall.

It has also been updated with our new Zoned Insulation, adding a light layer of sewn-through insulation to the bottom of the bag. This helps reduce drafts when joined with your mattress, and frees you to use your bag in a hostel or your friend's couch–wherever you don’t need a camp mattress.

We do recommend outdoor use however. It's just more fun that way.

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.

Zoned Insulation

Zoned Insulation puts loft where you need it most – on top of you where it traps rising heat. Beneath you we use less fill, where your mattress already insulates you, and the value of lofted insulation is already minimized by compression. This is possible because our sleeping bags integrate with your mattress, keeping it properly oriented to maximize warmth and save weight.

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

SynergyLink Connectors

The key to our System Solution is our patent-pending SynergyLink Connectors. Integrating mattress and bag, they make sure you stay on your mattress while you roll freely for the best nights rest possible. Two elastic bands create a snug fit around any mattress up to 25 inches (63.5 cm) wide, keeping your bag centered and eliminating problems with sliding off your mattress or getting your bag twisted around you.

Thermarest's Antares HD Sleeping Bag achieves a good comfort limit rating for its weight and especially gives its features. Firstly there's 750+ Fill Power hydrophobic down that performs much better in damp conditions than on-hydrophobic down. In addition the bag features a 'Thermo Capture' lining which is essentially a reflective layer that minimises heat loss and helps make the bag feel warmer more quickly.

On the bottom of the bag is a slender section with minimal down filling it because crushed down is pretty ineffective so more of it is located in other areas of the bag. This means you sleeping mat is important - you should use a downmat or a Thermarest XTherm in order to get the best out of this bag in cold conditions. There are two elasticated bands that keep the bag securely on the centre of the mat no matter how much you thrash about.

With a virtually full length zip, nice boxed foot, shoulder baffle and hood that cam be cinched around your head the Antares HD is a formidable sleeping bag ideal for those need a bit of help staying on their sleeping bag.

- 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
  • Zoned Insulation (Box-baffled 750+ fill Hydrophobic Down w/ sewn-through insulated bottom)     
  • Reflective ThermaCapture lining for added warmth without excess weight or bulk
  • SynergyLink Connectors integrate your mattress for optimal comfort and efficiency
  • Heat trapping draft collar and full-length zipper draft tube
  • Differential  cut maximizes loft
  • Snag-free zipper
  • Cinchable hood
  • External zip pocket
  • DWR-Treated 20D Nylon Shell
  • Stuffsack and storage sack included
  • Comfort -3°C, Comfort Limit -9°C, Extreme -28°C
  • Regular weighs: 950g
  • Long weighs: 1060g
  • Fill: 750+ hydrophobic down
  • Fill weight: Reg 440g, Long 500g
  • 20D Polyester w/ 20D ThermaCapture Reflective Polyester
  • Fits: Reg 178cm, Long 198cm
  • Girth (Shoulder/Hip/Foot) Reg 158/147/102cm, Long 163/152/102cm
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