Delivering enough warmth for ultra-light cool-weather climbs and backcountry excursions, the Marmot Hydrogen 30 Degree Sleeping Bag still weighs in at a wispy one pound for light and fast climbs and hikes.

Voted Best All-Around Summer Bag- Backpacker Magazine's Gear of the Year Awards 2009Going Ultralight doesn't have to mean suffering, because we never skimp on our lightweight bags. We'd rather find a way to shave the weight and innovate on performance, like using Flex technology for our Nitro 30. We build in Flex between the shoulders and knees, so you get the comfort and thermal benefits, while saving precious ounces. Our smart Foot Box Venting lets you customize the climate in the lower half of your Nitro, without adding the weight of a full-length zipper. Ultralight speed with full-featured comfort.

Lighten up so you'll be the one singing the last mile into camp. The Spark doesn't compromise comfort or warmth to shave ounces. We use partial Flex construction to keep the luxury meter pegged without adding noticeable weight. You'll sleep more comfortably, and more warmly, than ever before with Flex. Just to prove we're still attached to the details, we include all the bells and whistles, like Foot Box Venting, to make our Ultralight Spark as comfortable as bags weighing twice as much.

A zip-around rectangular bag that's great for car camping or backcountry hut use, the Marmot Down Yurt 30/40 Sleeping Bag also zips out to a Queen size comforter for an added layer of down warmth in the house.

When going light can make all the difference, the Exped Wallcreeper 30 Degree Sleeping Bag is one item you'll want to throw in your pack. This multi-purpose sleeping bag is the ultimate chameleon. You can wear it cinched around your waist as a parka, extend it full length for lounging around camp (or quick bivying with your boots on), or zip it open as a comforter/blanket. When it's time to bed down, close everything up for the ultimate ultra-light sleeping bag. Zippered armholes give you convenient out of bag access for melting snow and sorting gear without leaving the comfort of your bag. An Ultralight Texped PA35 ripstop nylon shell, with highly compressible 750-fill goose down insulation, completes this versatile three-season bag design.

Spoil yourself with the Arrow Rock 30, everything you dream about in a three-season sleeping bag. Flex technology throughout gives an unparalleled night's rest, allowing you to spoon, sprawl, or starfish until the sun comes up. Warm yourself with 600-series down, legendary for its thermal efficiency, light weight, and durable compressibility. The Arrow Rock 30 is about as good as it gets for cool climates, three seasons of the year.

Flex-it really does turn a regular night's rest into something special. Stretch baffles move with your tosses and turns during the night, making the Diamond Springs more comfortable, but also more thermally efficient, too. Sleep warmer, sleep better, period! Six-hundred-series goose down maintains its loft year after year and Sierra Designs' legendary details, like Pad Locks and an Ergonomic Hood, make the Diamond Springs your own private oasis.

Going light and fast requires equipment that is ultra lightweight, but doesn't skimp on durability. When The North Face designed the Beeline 30 Degree Sleeping Bag, they kept these criteria in mind. Incredibly lightweight and amply insulated with 850+ Eastern European goose down, the Beeline is build of revolutionary HelioLite™ HD Ripstop fabric that's lighter, stronger, and more compressible than any other material on the market today. Move fast during the day and sleep well at night, so you can get up and do it all over again tomorrow.

When asked to describe The North Face Kilo 30 Degree Sleeping Bag, one of our customers commented, "It rocks my world, I wouldn't be without it here in the UK. Nice one North Face!" For temperate conditions in the backcountry, the Kilo Bag is the ideal lightweight option for mild-weather adventures. Insulated with 600+ Eastern European good down, this 30 degree bag is very compressible and weighs in at just over 2 pounds. Incorporating features such as Climashield™ Prism anti-compression pads and trapezoidal baffle construction, insulation is evenly distributed to prevent cold spots and keep you warm.

Drizone has kicked butt on the weather from Alaska to the Andes, from the Poconos to the Pamirs. Waterproof-breathable Drizone protects insulation, making sure you stay warm even if the weather gods want otherwise. Six-hundred-series goose down offers an exceptional warmth-to-weight ratio, lasts season after season, and compresses to a tiny package inside your pack. See why the Trade Wind has been the talk of magazine editors and intrepid backpackers in the new millennium!

Flex™ is back! Thermally efficient and comfortable, it is designed into the mid portion of the bag, where you move most. PrimaLoft® Eco offers superior synthetic insulation, with an earth friendly twist. Made of recycled plastic and soda bottles, it is durable, lightweight and weather resistant. The Jacket Hood guarantees warmth down to 30 degrees and Foot Box Venting for regulates temperature.

A good night's rest means having a clear conscience, too. Sleep easy with PrimaLoft Eco recycled insulation in your Flare 30. Made from post-consumer recycled polyester, PrimaLoft acts like down for warmth, but retains its insulating properties when wet. We've adapted our Flex construction to Ultralight bags, using expandable-baffle Flex from the shoulder to the knees for comfort, without adding significant weight.