tldr; Reddit generally considers the Mountain Hardwear Phantom -40 an excellent winter sleeping bag, though some users with wide shoulders find it very tight.
Check pricesScores based on sentiment analysis of topic-related comments
Best praise vs top criticism for Mountain Hardwear Phantom
“It's hard to give advice without knowing your budget, because you could do with some big changes. You also need to list your clothing weight so we know what we're actually looking at. Excess clothing is almost always one of the top offenders. We also need to know the temperatures and rain conditions you'll be facing Get rid of these: - the chair - the sleeping bag liner, not needed - the clothes line - the crocs - the sleep clothing Big Changes: - Your pack is one of your biggest offenders. It's huge, but also way overbuilt. You should transition to something 50 L or less. Without diving straight into the world of ultralight frameless packs and much smaller volumes, you can stick with affordable packs from the big brands. I highly recommend the Gregory Paragon 48. I used to for years before really lightening my load. It's a very comfortable and competent pack. Another popular "UL transitioning" pack is the Osprey Exos, also coming in 48L. - A 30 degree bag should be way lighter than 45 oz. You need to switch to a higher fill power down mummy bag or quilt. The [MH Phantom 30](https://www.backcountry.com/mountain-hardwear-phantom-sleeping-bag-30-degree-down) is a decent bag with 850-fill down and one sale right now. Otherwise, consider an even lighter [quilt](https://enlightenedequipment.com/enigma-sleeping-quilt/) instead of a sleeping bag. A lot of the insulation in a traditional bag is wasted since you lay on top of it. - Your tent is fine for now; focus on other things - Your sleeping pad is super heavy for an R value of 3.7. Switch to a regular Thermarest XLite, which is an even warmer pad for nearly half the weight. Small Changes: - Your pillow is relatively heavy. Switch to a BigSky International DreamSleeper, or a Thermarest AirHead Lite. - Replace the PocketRocket with a Soto Windmaster - Your kettle is too big and heavy. Replace it with a Toaks Light pot. Somewhere between 550-750 ml. - You have way too much weight in water containers. Do you need a bladder, a jank Avex bottle, and two heavy nalgenes? Sounds like you have the capacity to carry like 5 liters or more? Replace all of these with a few Smartwater 1 liter bottles. Transition away from using a bladder. It's very freeing to rely only on much simpler water bottles. - Ditch the gas can stabilizer. Not needed - replace the Deuce #2 with a Deuce #1 - your towel is quite heavy. Replace with a Lightload towel. - You could consider switching from TP to a bidet and Wysi Wipes Clothing: - Replace your underwear with the lightest pair you can get. OR Echo or T8 Commando or Uniqlo Airism - You don't need socks and liner socks (depending on the conditions, which you should disclose). Pick one, ideally just the liner. - replace your fleece with an Alpha Direct fleece from e.g. Senchi Designs - You probably don't need the hat if you already have a buff and hoods - Your patagonia puffer can almost certainly be left at home or replaced with something lighter, dependin”
“For reference I own the rab phantom half zip as well as an embarrassing number of other waterproof/breathable shells. It will keep your dry, but you sacrifice a lot of durability. it is marketed as a 2.5 layer waterproof/breathable fabric which just means there is a face fabric, which is 7 denier (this is ridiculously thin) with the waterproof/breathable laminate. this differs from a 3 layer in that the 3 layer also has a permeable liner fabric that helps with "breathability" and feels less clammy. I don't trust that the 7 denier fabric will hold up underneath a pack and I certainly don't think it hold up vs a bush. breathability with rain jackets is sort of weird. if there is water on the surface of the jacket, air/water vapor cannot move through. if it's raining, it's not breathing. if it is not raining, why are you wearing it? I carry my phantom on trips where I don't expect to get wet, but would really suck if I did. I would not like it as my sole waterproof layer is really terrible weather while bushwhacking or climbing where it would be subject to abrasion. It is also slim fitting. even sized up it is challenging to layer over insulating pieces.”
158 Reddit opinions analyzed • Last updated 2/24/2026