AT Backpacking Gear: Sleep System

I’m preparing for an Appalachian Trail thru-hike next year. In addition to physical and mental preparation, I’m working through what gear to carry. My goal is to have less than 25 total pounds for a week’s hike, including food, water and fuel. One of the key items is the sleep system, since getting a good night’s rest is paramount. Hiking for 6 months across the eastern United States is hard, physical labor and you can’t do it on a couple hours of fitful sleep. As I’ve said before, the weight of your pack is all about what you are afraid of. My biggest fear is being wet and cold and freezing to death, so it’s not surprising that this category is a heavy one, over 4 pounds.

Sleep system

  • Sleeping bag: Big Agnes, Juniper SL 25F, Petite, 34 ounces   $224
  • Silk liner: 5 ounces  $70
  • Sleeping Pad: Big Agnes, Insulated Air Core, rectangular, 20×66, 22 ounces    $85 (THIS ITEM HAS CHANGED. I NOW USE THE Therm-a-Rest ProLite Plus Sleeping Pad, R, 20×72 AT 16 OUNCES)
  • Bivy SOL Emergency Bivy 4 ounces    $17 (NOTE: After a November shake down hike, I ditched this item. With a better tent, I didn’t need it)
  • Pillow Cocoon Hyperlight Air-Core Travel Pillow 3 ounces $30

Sleeping Bf96e7781-662c-483e-96db-d0b603c854afag

I chose a down bag to keep the weight-to-warm ratio high. I upgraded from my Mountainsmith Vision 15F bag (under 2 pounds) because of moisture. The down feathers and the outer cover of the Big Agnes bag are treated to repel water. That adds weight, but a wet bag is worse than useless—it’s heavy and it won’t keep you warm. I also plan to carry the bag loosely in a trash compactor bag inside my pack, rather than forced into a stuff sack. It’s been my experience that I’m colder each successive night of a long hiking trip. I theorize that the loss of loft in the bag is a big part of this issue. It’s the trapped air inside the loft that keeps you warm. If you keep crushing it into a tiny stuff sack the bag simply traps less air.

78536664-aeb1-4bd5-bec2-e0089996a351Silk liner

A silk liner will add 8-10 degrees Fahrenheit on a cold night. And it can keep your bag cleaner, reducing the number of washings (since that will eventually wear off the anti-water treatment). Wear it on the inside to protect your bag from your dirty clothes and body. Wear it outside your bag to protect it from the surroundings (like at a hostel). And in the summer I can use it as a light sleeping cover. This is an item I’ve had for years. Personally, I slip the silk liner over the outside of my bag because it don’t lose it in the dark recesses of the bag. I’ll also slip the foot of my sleeping bag into my backpack (and the trash bag liner) if my feet are still cold. I also keep an extra fluffy pair of socks just for sleeping in and will add my coat, gloves and hat if I need it.)

aa544dd6-8600-4cb8-8c96-b7f06ce7df1dSleeping Pad

This is an area that I could cut some weight on, but at least for the colder parts of the hike, I want the comfort and warmth of a full length air mattress. I sleep cold. The Big Agnes pad gives me some reflective heat AND it will insulate me from the ground. Plus it’s long and wide enough that I won’t have any part of my body on the cold, hard and possibly wet ground. I can switch to a closed cell foam to reduce weight. This pad replaces an older model Therm-a-Rest, which has served me well, but weights too much.

As an aside, I gave the Therm-a-Rest NeoAir XTherm Sleeping Pad a very serious look. Though horribly expensive (about $200) they weigh less than a pound and have a shiny, space blanket material inside to reflect back your body heat. But honestly I rejected it because of noise. I don’t want to hear it every time I move. It would be like sleeping on a bag of potato chips. And it looks fragile.

(THIS ITEM HAS CHANGED. I’VE REPLACED THIS WITH THE Therm-a-Rest ProLite Plus Sleeping Pad, R, 20×72 AT 16 OUNCES. Part of the change was weight, but also the amount of time/energy it took to blow up the mattress. The Therm-a-rest is partially self inflating.)

78a4e9f7-6941-4b4c-b066-dc3bc06f2b33Bivy (NOTE: After a November shake down hike, I ditched this item. With a better tent, I didn’t need it. If I were starting my hike in early March or–heaven forbid–February, I’d carry it.)

I’ve had the SOL Emergency Bivy in the trunk of my car for months and I’ve carried it once or twice on a trip, but I hadn’t even unrolled it from the tiny stuff sack until my last trip. At 4 ounces and $17, it’s surprising how nice this is. Totally reflective inside to trap heat so it might add up to 10 degrees F on a cold night. But the material is both tough and stretchy so it doesn’t tear like an emergency space blanket. It’s large enough to fit my sleeping bag, sleeping pad and me inside. And it doubles as a ground cloth. That’s a lot for 4 ounces. I’ll destroy it within a couple months of hiking, but by then it will be warm weather and I won’t need it. And they’re cheap to replace. Most bivys are $150+. Even the SOL Escape Bivy is $50 and double the weight. It’s possible that I don’t need both the bivy and the liner. I certainly won’t need this item in summer.

0cb41cb8-687d-4efc-9a32-36e629397611Call me a wimp….

..but I need a pillow. Lately, I’ve been carrying my clothing in a stuff sack that has a silky feel on one side and a brushed surface on the other (fairly heavy for a stuff sack). I’ve used it as a pillow by stuffing extra clothing into it. That works as long as you have extra clothing to put into it. But the essence of Ultralight backpacking is to avoid  “extra” weight. I’ve just added the Cocoon Hyperlight Air-Core Travel Pillow to improve my sleep. I’ve ditched the stuff sack and will just keep it inside my sleeping bag. According to the advert, it weights 2.4 ounces. My scale says it’s 3 without the stuff sack. Grrrrrr


(With changes, this category now includes a Therm-a-Rest Stuff Sack Pillow, rust at 2 ounces. The total weight is now 60 ounces)

AT Backpacking Gear: Backpack

I’m preparing for an Appalachian Trail thru-hike. In addition to physical and mental preparation, I’m working through what gear to carry. My goal is to have less than 25 total pounds for a week’s hike, including food, water and fuel. To do this, I’ll need to have my base weight (non-consumable items) well below this total. This is key to Ultralight backpacking.

My new backpack, a Jam 70 from GoLite
My new backpack, a Jam 70 from GoLite

Most of the weight comes down to these four things, and I need their total to be under 10 pounds:

  • Backpack
  • Shelter system
  • Sleeping system
  • Cooking system (minus the food)


Today I focus on my choice of backpack, which is very key. It determines how much volume and weight you can carry. After a lot of consideration I bought a GoLite, Jam 70L, $120. It only holds 30 pounds, expands to 70 liters, but it’s made of “stronger-than-steel Dyneema® and Ripstop Nylon.” It also sheds water (which is not the same as waterproof, BTW). It weighs more than I wanted, though. The Jam 70L is listed at 31 ounces, but I weighed it at 33. I could have bought the 50L, but that would have only saved an ounce (and $10). With the unique “load lifters controls” at the bottom of the pack, I’ll have more room for bulky, winter gear during the colder months and can easily cinch up the bottom and sides during warmer months when the room isn’t needed. It’s important that I’m able to take up the slack in the pack from the bottom since I want the weight carried high on my body. A consideration that came up later is my desire to pack my down sleeping bag loosely. It’s not the bag that keeps you warm, it’s the trapped air. Keeping the bag loose means you don’t squash down the loft of the insulation every day by forcing it into a tiny stuff sack. But the most important consideration with any sleeping bag is keeping it DRY. It’s doubly important with a down bag.

No doubt, one of the reasons I bought this pack is that I had great experience with an earlier GoLite product, an early Sil-Nylon version. It was a bit fragile, but I’ve managed to patch it successfully (if not attractively)with duct tape. I always hated the orange color, though, so it’s a good thing that backpacking is not a fashion statement. The Jam was named Backpacker Magazine’s 2012 Best All-Around Ultralight Pack. That helped too.

Second Guessing

Thirty three ounces is 21% of my total goal weight for the key four items (10 pounds = 160 ounces). Is that too much?

Here are two thoughts I’ve mulled around:

1). I may have bought the wrong pack. My friend Skittles carries something the size of a day pack. Maybe I need to go back to my ugly orange pack? Or maybe he’s just a more rugged individual than I am? The weight of your pack is a measure of your fear. What am I afraid of? Well, being wet and cold and freezing to death. Yeah, that’s it.

2). Here’s a radical idea: Mike Clelland says in his book Ultralight Backpackin’ Tips to cut away anything you don’t need. “Get the scissors and go to town on your pack. This is one place you can really clear away some significant ounces.” Yikes!

Well, I have to admit that the straps on this thing are exceptionally long, so maybe I can trim them off. And I never use the inner hydration bladder pocket. (Maybe it works for you, but one leak is all you need to soak your sleeping bag and clothes.) Mike recommends deeper cuts—like modifying the opening  or removing the side compression straps—but I’m not sure I can make myself do that. Yet.

The straps on this pack are very long, so I snipped off what I didn't think I'd need, then sealed the edges. This is an ounce of excess.
The straps on this pack are very long, so I snipped off what I didn’t think I’d need, then sealed the edges. This is an ounce of excess in the bowl of my scale.


So I got out my scissors and began trimming extra-long straps and tags. I removed one set of the side compression straps that I thought were redundant and pretty useless. I found a few labels to remove. But it only added up to an ounce. Still, it’s an ounce. If you do this, remember to take an open flame to the end of the nylon straps after you trim. Just lightly melt the edge to seal them. Fast and easy with no sewing.

I’ve kept the hydration pocket for now, but it may go later. I’d like to keep it for storage.

Pack Cover

And, though I bought the pack cover that goes with the Jam, my good hiker friend Skittles assures me that no pack cover will keep a pack dry in a serious downpour. He recommends Glad compactor trash bags as a liner for the pack. They are durable, weigh about an ounce and are cheap (a box of 4 cost $3). The white color makes it easy to find things inside of them. Not taking the cover will save 4 ounces (But I spent $15 I didn’t need to).

DSC_0393And there are other advantages of the Glad trash compactor bags. They are large enough to carry my sleeping bag loosely while still leaving room for clothing and other items that must stay dry. It can also double as a small ground cover beneath me in the event of damp ground/flooring. And, though I’ve never tried it, I’ve read that they can go over the bottom of a sleeping bag to help keep it dry and keep you a bit warmer in very cold conditions. That’s a lot to get for one ounce of weight!