NEMO  Disco 15 Endless Promise Down Sleeping Bag - Men's

I probably spend more time optimizing sleeping gear than other backpacking items, and while I have always leaned toward lightweight, summer-oriented down sleeping bags, the comfort and thoughtful features of the Nemo Disco 15 Endless Promise changed my entire load-out formula. While my Disco 15 weighs more than my other bags (mine is 1,290 grams/2.837 lbs. packed inside the included stuff/compression sack), after I leave behind my temperature-rated sleeping bag liners and rely on the Disco 15's integrated pockets, the mass aligns closer to my other sleep gear--with far better features. The two-way, 3/4-length side zipper is large and fumble-free, so I don't wake others as much in the middle of the night. It's more durable than the zippers on my slightly lighter (and far more expensive!) sleeping bags that rely on small, often one-way side zippers for weight savings. Over time these small and ultralight zippers usually end up jamming with trail dust and tent grit, or worse--the nylon zipper chain eventually bends at a crease and tiny zipper pulls won't pass over it. I feel confident about the Disco 15's zipper durability and lifespan. I like the headroom and waterproof material at both ends of the bag--places most likely to brush tent wall condensation. I'm a smidgen under 6'1" and the regular size perfectly fit my side-sleeper habits. There's a roomy pillow pocket that accommodates the largest backpacking pillows I have, but to save pack weight I will likely stuff my midweight fleece tops into this pocket. The breathable zippered mesh vents ("Thermal Gills") atop the bag allow ventilation, even when I pair it with an ultralight sleeping bag liner. I found that these vents also enhance my sleeping flexibility, so I have elbow room to roll to a side-sleeping position far more easily than wide side-sleeping bags without this feature. With the vents open and paired with the Nemo Tensor insulated sleeping pad in regular/wide size, I didn't overheat on an upper-30F early spring evening in the Cascade foothills. The interior of one of the Thermal Gills doubles as a storage pocket for battery-powered items or small essentials (like a tiny headlamp for getting up in the middle of the night). It's a warm pocket for gear that might lose battery power on a cold night. About elbow-high in the lining folds is a tiny zipper pull that's almost easier to locate by touch than sight, which makes sense when you're fumbling around in the dark. My only issue with this design is that the pocket is small enough for a lightweight, short-range headlamp OR a compact battery pack, OR the smallest models of satellite communicators, but probably not all three at the same time. I like to read offline or play games on my iPhone Plus at night, and the phone alone won't fit in this pocket. The exterior fabric on the Disco 15 is far more durable than my lightweight bags, and the Disco 15 fabric also beads water droplets from tent condensation and errant raindrops far better than any down sleeping bag I own. I didn't worry about moisture seeping into the fabric and compromising down insulation performance--or adding to my pack weight on my return hike. The zippered storage sack on Nemo's Disco 15 is square and securely fits in my closet space better than the traditional, rounded drawstring sleeping bag storage bags. Durable compression straps make the Disco 15 easy to fit inside backpack sleeping bag compartments, but the dimensions are significantly taller and wider than a 32-oz Nalgene bottle. The bag's proportions are better compared to bestselling bear cans, where the Disco 15 remains narrower but taller. Considering the comforts and hassle-free conveniences, the minor trade-off in ounces and volume is ideal insurance in unpredictable transition-season temperatures. This is my new favorite sleeping bag for extending my backpacking season earlier into spring and later into fall.

Fairly disappointed with the 600FP down. The down seems to be very sparsely filled around the core area of the sleeping bag. No matter how long you let it loft, if you hold it up against some light, you'll notice a ton of gaps in the down. With that said, I used this bag at the mentioned ISO comfort rating at 28F for a mens version. Keep me warm all night. Keep in mind I was wearing a base and a fleece mid layer. Not sure how it would perform with only base layers. Nemo also seemed to have removed the exterior zipper pocket, which used to be very handy to store my phone in on cold nights. Not sure if I got a faulty piece, I would rather spend the extra $80 or so and get the 800FP Riff versions.