TETON SPORTS Altos-S 0F Ultralight Mummy Sleeping Bag, Orange

First and foremost, this is an excellent sleeping bag for the price. It's a very warm bag (perhaps too warm for all but the coldest nights) but it's also not excessively heavy or large. I purchased the bright orange bag rated for 0F (-18C) and the bag itself comes in at only 1295g (2.85lbs) and with the included compression bag the whole things is 1455g (3.2lbs). It packs up reasonably small for a 0F bag, but it's still a significant volume even when compressed.Pros:- Extremely warm bag- Packs up to a respectable size given the insulation value- Very light given the insulation value- Material feels soft and comfy, if not a little cheap- Very good neck baffle, and mummy top drawstring- Zippers are well baffled- Shape is snug but comfortable- Color is pretty coolCons:- Zippers feel cheap. I wish they used a better quality zipper and charged an extra $10- The bag is warmer and larger than most people will ever need, but it's their lightest bag- Zipper frequently snags inner baffle when closing- Drawstrings feel a bit cheapI find Teton's ratings and weights to be incredibly confusing, and there are several nearly identical looking products spanning the $99 up to $300 price points all with pretty non-sensical weights listed, with significant discrepancies between their website and Amazon. This matters a lot for those backpacking and looking for a lightweight sleeping bag, so having unreliable numbers there isn't great.Finally, I wish Teton would make a truly ultralight and compact 30-40F bag using the same general construction as their 0F bag, but with less insulation. There is a lack of good options for simple fall camping where a bag like this one is really too warm, and as a result, larger and heavier than needed. If they could make a bag like that at this price point, I would buy it in a heartbeat.

primeras usadas y primeras impresiones1ra noche temp de 5° con casa normal de verano , el sleeping fue muy muy caliente... termine durmiendo con tines y boxer no aguante el aire caliente y baje poco el cierre y abriendo la puerta de la casa2do uso, temp de 0° con llovizna, casa de 3 estaciones se portó de maravilla .. vestimenta ligera nuevamente. fue comoda la temperatura interior... solo note humedad externa por condensacion ,creo que mientras mas frio el exterior el sleeping te ayuda a generar mas calor o aprovechar tu calor a lo que por combinacion de temperaturas se genera condensacion... lo senti mas en la zona de piernas... seguire usandolo y actualizare info...tamaño perfecto para 183cmActualizacion.. usado en el izta con casa 3 estaciones , ropa pijama, temp -4° una chulada de sleeping para mantener el calor. debajo use un pad de yoga y colchon inflable.

Long term review:I am writing this review 5 years after my original purchase, over which time I have used this for 2-4 weeks per year.The sleeping bag has been fantastic. It is still going strong without any major issues. The zips have held up well and the synthetic down remains warm as ever. I have no complaints about this bag and it has seen me through camping and hiking in all conditions. It's very warm, which is great if you run cold, but is sometimes too hot for summer camping in Australia (often I will use it unzipped or half on me for warmer nights). It's long enough for my height of 6 ft and I enjoy the cozy mummy shape, although I've had friends who find the tight leg space uncomfortable.

My friend recommended this bag to me in 2018. I love the weight, reliability, comfort, and ease of packing with the compress pack. I took mine to hike Mt. Fuji in 2018, where it got completely soaked for 4 hours as I hiked down the moutain and typhoon Jebi caught me off guard. It dried out well and went on many more adventures and counting. It's small enough to comfortably use for sleeping in a compact car on long road trips, random camping trips, survive the freezing nights of the Mojave desert, and can be spread out roughly on top of other blankets as an extra precaution against the cold. In 30°F weather, it gets too hot within an hour. I always have to open the zipper and let it breathe more. It was comfortable to as low as 20°F weather with no wind-chill when fully zipped. The thickness is nice and adds extra cushioning that helps me sleep or camp out in the most random places that I've ended up in. Bang for buck, this is the best sleeping bag I've ever got at this price point and one of my most reliable. The zipper and build quality is durable and beefy, while staying light weight. The comfort is amazing. I wish I could recommend this sleeping bag more and give it a 10 out of 5. My family members and friends loved it too and some have been buying it after trying mine.

Took this to the grand canyon in February and it kept me relatively warm. The temperatures at night got down to about 2 degrees Celsius and the bag worked fine. It wasn't super warm but for the money it was good and lightweight.