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Hyke & Byke Antero 15 Sleeping Bag and Hammock Peapod Review

Peapod Hammock Quilt

The Hyke & Byke Antero 15 is a hybrid ground sleeping bag and hammock peapod insulation system meant to lower the cost of entry into outdoor recreation. I recently reviewed another hammock peapod system, the Outdoor Vitals MummyPod. The Hyke and Byke Antero 15 is a similar concept but it is executed quite differently.

Hyke & Byke Antero 15 Sleeping Bag and Hammock Peapod

Ease of Use
Warmth
Weight
Features
Versatility

Not Ready for Prime Time

Peapod hammock insulation is a simple idea but hard to pull off successfully. While the Antero 15 works in a fashion, it's not as warm as advertised and could be better with minor manufacturer modifications.

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What’s a Peapod? Just like your underside needs a pad for insulation when sleeping on the ground, when you’re in a hammock you also need insulation underneath you. Most hammock users hang a 3/4- to full-length underquilt for bottom insulation. Another method is the peapod. It’s pretty easy to see how it got that name. The peapod idea was most notably brought to market by Ed Speer of Speer Hammocks. It’s a great concept, but it can be hard to pull off successfully.

Definition of Hammock Peapod
A hammock peapod insulation system provides top and bottom insulation in a single unit

Specification Inaccuracies and Inconsistencies

Unfortunately, Hyke & Byke has a problem with the accuracy and consistency of their specifications. That set off alarm bells with me, since consumers, especially people new to backpacking or camping, need accurate and clear product specs to help them understand the suitability, safety, and value of sleep insulation gear. I can’t tell whether the information inconsistencies are deliberately meant to make the bag seem more competitive or if they come from inexperience and growing pains. But I have engaged extensively with their customer service agents and the specification inaccuracies persist.

To give you a taste of the issues involved, here’s a subset of the misleading specs that I found.

Temperature Rating

The Antero is described as a 15*F bag, but it is nowhere close to that.

Most people buy a sleeping bag rated for the temperatures they expect to experience. While the bag is sold as a 15*F bag, looking carefully at the specs sheet shows that this is actually the Extreme/ Survival rating. The Limit rating is 30*F and the Comfort rating is 50*F–a far cry from 15*F! The Limit Rating is the minimum temp at which an average man will be warm and the comfort is the average temp at which an average woman will be comfortably warm. These two ratings are what one should really look at for a bag rating, and are on a spectrum dependent on the user’s body type, metabolism, caloric reserves, etc.

Hyke & Byke’s sleeping bags are rated in accordance with the International Organization for Standardization (ISO) 23537 standard testing protocol, the 2017 update to EN temperature ratings, which is a good thing, but the decision to name the bags by their Extreme/Survival rating is a problem. The ISO describes the Extreme/Survival rating like this: “In this range, a strong sensation of cold has to be expected. There is risk of health damage by hypothermia. A sleeping bag should only be used in this range in an emergency.”

hammock peapod
The Antero cinches up around the head to lock in warmth

Insulation fill type and weight

Hyke & Byke’s website lists the Antero 15’s fill weight at 710 grams (25 ounces).

  • The product tag lists the insulation type as 90/10 800FP Goose Down.
  • The Hyke and Byke website also lists the insulation type as 90/10 800FP Goose Down but adds “LofTech base powered by Allied,” under the category of shell fabric/base.
  • On their Amazon page, Hyke & Byke says, “Our quest for the perfect solution led us to utilize Hydrophobic 800 FP Goose Down on top and Allied’s revolutionary LofTech Summit on bottom where down isn’t necessary. LofTech performs better than down for durability under compression and moisture resistance and it has been called ‘the closest synthetic insulation to natural down ever developed’ by the Outdoor Industry Association.”

That would mean the Antero 15 is a hybrid down/ synthetic bag, not a goose down sleeping bag as stated on the product tag, which is the only thing that would make the fill weight make sense because the bag is nowhere near as warm as other bags with this fill weight.

Product Performance

So how does the product perform if it’s more accurately described as a 30 degree, hybrid down/synthetic sleeping bag and peapod system?

Temperature Rating

The Antero bag has kept me warm down to 40 degrees for ground and peapod use, but I wouldn’t want to take in much lower than that. I’m on the short side and fairly lean, so I probably sleep a bit colder than taller or heavier adults males. In the absence of sleeping bag temperature testing equipment, I’d say that a 30 degree Lower Rating is realistic.

Unique hood closure
Comfortable details include a soft chin guard and a small anchored cordlock off to the side

I appreciate the fact that Hyke & Byke tested the temperature rating of the Antero using the ISO temperature rating standard. I just wished they’d advertised the Antero with a Lower Limit Rating 30*F, which is the norm used by the rest of the outdoor industry, instead of the Extreme Limit Rating of 15*F. That is confusing.

Attachment to a hammock

The Antero attaches to the hammock via two drawstring tubes–one at the head end and one at the foot end–that cinch closed with a cordlock. This system is simple, intuitive and allows for the hood to have a snug fit around the head and face which is great for locking in warmth. There is no additional suspension system holding the bag in place beyond these drawstring tubes.

The Antero uses static (non-elastic) cord for all its drawstrings–at the foot end, the head end, and around the face. However, hammocking is not a static activity–any movement in a hammock causes sway, and the trees themselves can sway in the wind. As the closures have no natural give with your movement, the only thing that can give is for the cordlocks to slide up their cords under pressure, loosening the openings. This causes the ends of the hammock to slide down the hammock towards the middle, dropping the insulation away from the underside of your body, which happened to me the first night I used the bag in hammock mode.

To keep the bag from slipping in the night, slip the drawcord over the hammock end for a makeshift suspension

I searched online to see if anyone else had this problem, and one reviewer on Amazon suggested clipping the drawcords to the carabiners which attach the hammock to its suspension. My suspension system doesn’t use carabiners, so I cinched up the cordlocks on either end of the bag and slipped the cord loop over the gathered ends of my hammock. This worked well to keep the bag suspended in place but was still a static system that felt tight and restrictive. The peapod system would be vastly improved if the drawcords were replaced with shockcord.

I did appreciate that the bag’s girth and shape allowed me to get a slight diagonal lay in the hammock which is often difficult to do with peapod systems.

Shell Fabric

The shell fabric, in black, has a plasticky-looking finish, and this shiny DWR coating is effective at shedding water. I experienced this firsthand in a leaky shelter.

Hyke & Byke offers a number of bright color combinations between the shell and liner. The liner is super soft and silky, the most comfortable lining fabric I’ve ever experienced in a sleeping bag. But when I asked Hyke and Byke’s customer service for more information about it, I was told that its a cotton blend. If true, that is a red flag. Cotton is not a fabric meant for the outdoors in any inclement conditions because it’s too difficult to dry with body heat, especially on the inside of a sleeping bag.

Anti-snag zipper
The YKK Anti-Snag zipper has a stiffener under one side but not the other, and that other side can get caught in the teeth

Anti-snag YKK zipper

I was actually able to snag the fabric of the Antero in its anti-snag zipper. There is grosgrain ribbon acting as a stiffener under one side of the zipper but not the other, and the thin fabric of the other side would occasionally get caught in the zipper teeth when zipping rapidly.

Despite this, the center zipper does make it easy to get in and out of the Antero at night, especially when used with a hammock.

Pockets

Pockets on sleeping bags are very handy to keep batteries from freezing and your headlamp close at hand. The Antero has long (but shallow) puffy pockets on the inside of the bag, with an integrated security pocket closed with no-snag velcro on the right-hand side. These pockets act kind of like a chest baffle, filling some of the dead-air space between the user and the top of the bag when in hammock peapod mode, but their utility as pockets is limited.

I put my phone, camera, and headlamp in the main pockets and my keys in the velcro pocket. The heavier items sagged in the pocket and rested on my chest. Three out of the four items fell out on top of me in the night–including the keys in the “security” pocket. Only the headlamp remained in place, down in the corner of the pocket close to my ribs.

center hammock zipper
The center zipper makes it easy to get in and out at night

Qualified Recommendation

The Hyke & Byke Antero 15 is a very viable peapod insulation setup if you’re looking for all-in-one hammock insulation system that is simpler to use than a top quilt/underquilt combo and a lot less fiddly. You’ll still want to replace the static cord with shockcord, as I describe above, but the Antero isn’t bad value for $200, provided that you don’t try to take it below its 30-degree Lower Limit rating in the air or on the ground.

Likes:

  • Super comfortable liner fabric
  • Water-resistant shell fabric
  • Design that keeps the benefits of a mummy bag (head warmth) while in hammock mode
  • Comfortable placement of face drawcord cordlock (off to one side) and use of a soft chin guard for the zipper
  • The shape of the bag allows for a slight diagonal lay in hammock mode

Room for improvement:

  • Clarify the bag’s true specs and materials across all platforms
  • Replace static cords (around the face and on both ends) with elastic shock cords
  • Name sleeping bags according to real-use temperatures, not extreme/survival ratings
  • Bigger stuff sack and/or a more robust material
  • Redesign interior pockets so contents don’t fall out.

About the Author

Greg Pehrson is an ultralight backpacker who was bitten hard by the MYOG (make-your-own-gear) bug. He repairs, tinkers, and builds gear, often seeking to upcycle throwaway items or repurpose things from outside the backpacking world.

Disclosure: Hyke & Byke provided SectionHiker with a sample Antero 15 for this review.

Editor's note: Help support this site by making your next gear purchase through one of the links above. Click a link, buy what you need, and the seller will contribute a portion of the purchase price to support SectionHiker's unsponsored gear reviews, articles, and hiking guides.

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7 comments

  1. Greg,

    Thank you for the honest, detailed appraisal.

  2. Hi. Thanks for the review. I didn’t see a weight listed for the whole thing kisted. Was it close to what is listed from the company?

    • Sorry for my late reply, Ray, and thanks for your question. As I weighed the Antero on my scale it came in at a weight of 38.7 ounces plus 2.3 ounces for the stuff sack. Hyke and Byke’s website lists the “total pack weight” as 2.87 pounds (45.92 ounces) which likely includes the stuff sack. So my measurements came well _under_ the stated weight which raises questions of standardization, especially of the amount of fill used.

    • Back in the 1970s, before much variation in cubic inch “fill power ” was advertised, it was sometimes said that X pounds of down would result in Y temperature ratings. (I think it was two and a half pounds was good for zero degrees F, but not sure.) If H&B fudges this, that’d be good to know.

  3. PS–the formula, whatever it was, I probably read in an early edition of Fletcher, and applied to generic mummy designs.

  4. Sorry. Formula was Xpounds fill = Y temperature ratings.

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