

🛌 Sleep Light, Hike Hard, Stay Warm — The Ultimate Ultralight Down Upgrade
The WIND HARD Dusk Upgrade 7D Ultralight Sleeping Bag combines cutting-edge 7D ripstop nylon with premium 800FP ultra dry grey duck down to deliver exceptional warmth at an ultralight 540g. Designed with a wraparound structure and advanced windproof features, it offers reliable comfort down to -2°C (28°F) while compressing to a compact 25x14cm size. Ideal for three-season backpacking, this tear-resistant, form-fitting mummy bag fits users up to 175cm and comes with a lifetime warranty—perfect for millennials who demand performance, durability, and packability on every outdoor escape.







| ASIN | B0BYCZFH8C |
| Age Range (Description) | Adult |
| Best Sellers Rank | #686,930 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #1,099 in Camping Sleeping Bags |
| Brand | WIND HARD |
| Brand Name | WIND HARD |
| Closure Type | Zipper |
| Color | Dusk |
| Customer Reviews | 4.0 4.0 out of 5 stars (17) |
| Date First Available | March 14, 2023 |
| Fabric Type | iFlex 7D DWR Ripstop Nylon |
| Fill Material | Down |
| Fill Material Type | Down |
| Global Trade Identification Number | 06970665241701 |
| Included Components | sleeping bag x1,compression sack x1,mesh storage bag x1 |
| Item Dimensions LxWxH | 3 inches |
| Item Package Dimensions L x W x H | 11.73 x 6.93 x 5.31 inches |
| Item Weight | 540 Grams |
| Manufacturer | Nanjing Aegismax Outdoor Sports Equipment Co.,LTD |
| Material | iFlex 7D DWR Ripstop Nylon |
| Maximum Height Recommendation | 175 Centimeters |
| Model Name | DUSK |
| Occupancy | 1 Person |
| Outer Material | iFlex 7D DWR Ripstop Nylon |
| Package Weight | 0.7 Kilograms |
| Product Dimensions | 77"L x 30.7"W |
| Seasons | 3 Seasons |
| Shape | Mummy |
| Size | Standard |
| Special Feature | Tear Proof |
| Sport | Mountaineering |
| Suggested Users | unisex-adult |
| Temperature Rating | / |
| Warranty Description | Warranty: Limited Lifetime Warranty – AEGISMSAX products are warranted to the original purchaser against manufacturing defects in materials and workmanship for the lifetime of the product. |
D**S
Exactly what I was looking for.
Exactly what I was looking for, for a three season bag. First, it weighs just over 19 ounces for the ounce counters like myself. Personally I use a bag liner and stuff my sleeping gear at the bottom to allow it to conform to the space. This past weekend I camped in the Mark Twain National Forest where the low was supposed to be 25ish but woke up to 15° f on Saturday morning. This would’ve left me cold but I brought a thinner bag to boost the warmth. Unfortunate for me my sleeping pad should’ve had a higher R value and that’s on me. Felt comfortable at 31° when I went to bed. I’m middle of the road as far as being a cold or warm sleeper. I bought the regular length which fits me well at 5’7”. The height limit is under 5’9” so keep that in mind. I weigh about 155 lbs and the girth fits me fine. They definitely made it more form fitting to cut back on material and save weight. If you like to sprawl out then this bag may be too restricting. Pros: -Weight as advertised. -Perfect for my height 5’7” -Added material to protect from tears along zipper. Important because my son tore another bag first time out that didn’t have this feature. Compresses small.
J**N
So Far Looks Great
I haven't used it yet, but its unbelievably small and light, and yet when you fluff it out, it has good loft. Mine seemed to have pretty uniform down distribution, I held it up to a sun lit window, and all the chambers seemed to have a decent level of down. I'm mildly concerned about the durability of the fabric, I guess we will see, its incredibly smooth and thin. I will try and remember to update after the first couple trips with it. But more than likely will forget unless its goes poorly, so no update implies it was good. My use case is late spring through early fall NC camping. So probably lows in the 50s->80s.
K**Y
Its a great value
Good value, extremely lightweight. I cant believe you can buy stuff like this for this cheap. I would rather buy this and carry a little less weight elswear. MY base weight is already super light like 6 lbs range. I love that i can get. a cheap kit together and not spend a fortune and not have to worry about wrecking my gear since replacement would only cost around 300 for everything, pack, sleeping bag, and my shelter is just a SUL bivy. which is cheaper than my 600$ tent that i lost.
A**R
Light weight!
I was unsure about this bag when purchasing. I chosen the long version because I needed shoulder room. This bag is very warm,comfortable and lightweight at 21.0 Oz. Seems well made. I took it out on a three night backpacking trip in the whites and at keep me warm in the mid 40s. Anything warmer than higher fifties i unzipped it and used it as a quilt. This back packs down real small.
S**N
very packed
The packed small size is what I was looking for. It does not take much space, which is very good for my camping bag.
D**L
Great bag!
Light weight! Filled with down. Would keep you warm with layers at 40 degrees.
R**N
This sleeping bag is recommended.
After taking out the sleeping bag, place it in a storage bag for a few hours or pat it with something, so that it is easier to fluff up. The material used is 7D nylon, which looks thin and soft, but is very strong and feels very soft when it touches the skin. The down is 800FP. Although it has a little smell, it proves that it is not cleaned with chemicals. This sleeping bag is recommended.
M**S
Sehr lausige Füllung, gut die Hälfte der Kammern bleiben leer, egal wie lange man den Schlafsack atmen lässt, besonders die Rückenpratie ist so gut wie nicht mit Daunen gefüllt. Das Wärmekragenprinzip ist sehr unterirdisch, der Hals bleibt eigentlich immer frei und man wird somit auch immer frieren wenn man in die Temperaturbereiche kommt, in dem ein Wärmekragen eigentlich Sinn machen sollte. Die Größenangaben beziehen sich wirklich nur auf sehr schlanke Menschen, wiegt man mehr als 80Kg, sind diese Schlafsäcke echte Wurstpellen, was die eh schon spärliche Füllung dann komplett obsolet macht, da man eigentlich alles plattdrückt von innen, leider sind auch die längeren Versionen dieses Schlafsacks auch sehr schmal gehalten und lediglich 6cm breiter im Schulterbereich als es die reguläre Version ist. Einzig gut finde ich die Stoffauswahl und das man einen Doppel-Reißverschluss verbaut hat der sich auch sehr weit öffnen lässt, das wars dann aber auch schon, das tolle niedrige Gewicht resultiert aus dem sehr dünnen aber sehr bequemen und stabilen Stoff und eben durch die winzige Bauform sowie der sehr dürftigen Füllung, ich hatte aber mehrere Daunenschlafsäcke hier zum testen und der Wind Hard war der einzige der Federn verlor, was auch wiederum für eine nicht ganz so gute Stoffauswahl sprechen würde. Alles in Allem absolut keine 100€ Wert, wird aber weitaus teurer verkauf, daher echt keine Empfehlung von mir, dieser Schlafsack performt wie ein etwas besserer Sommerschlafsack, die Komforttemperatur von +4 Grad Celsius wird er aber niemals erreichen können ohne Zelt oder Biwaksack schon gleich zweimal nicht.
C**P
The sleeping bag’s material stand out immediately. It feels lightweight yet resilient, promising warmth and longevity for outdoor activities. The compact design is an added bonus, making it a practical choice for any camper.
M**E
Lo he usado este fin de semana con temperatura exterior de -3 grados. Dormí en tienda de campaña naturehike vik2 solo, y combinado con un forro MLT8 de aegismax, no pasé nada de frío, temperatura super comfortable. La única pega que le pondría es que un par de veces en la noche, al abrir el saco, la cremallera se enganchó, pero nada alarmante. Lo recomiendo al 100%, el peso y el tamaño imbatible a ese precio.
A**.
The bag is very light and warm, I weighed it and it comes out to 1lb 3oz. I bought it for bicycle touring and it works great. Packs up very small too. I only do summer camping, so it was more than warm enough (temperature only got down to 10°C). I would've given it 5 stars, except I woke up covered head to toe in down, and the inside of my tent too. Lots of leakage, so I'm not sure how long it will last. The material is thin, but it feels quite durable. This bag seems like a copy cat of the Sea to Summit Spark bags, but $600 cheaper and it actually seems warmer, as I had a Spark II and returned it because it didn't seem worth $800 to me. For a knock off bag this one seems pretty good.
T**N
The pictures and description could not be more disingenuous. There's no way it's 800fp and it doesn't loft half as much as the pictures show. The gaps in the down are MASSIVE as I can easily see straight thru both sides of the bag in the light. Literally looks like it's missing at least half of its down... I even gave it the benefit of the doubt and let it loft for over 8 hrs and it didn't help. I'd be weary about anything else this company sells based on this bag. It's a shame because everything else seems pretty good... Materials are light and comfortable and the zipper doesn't snag at all. I'll be going on a week long hike with it as I have no choice. Nights are supposed to be around 10°c and I'll update the post about it's performance.... Not hopeful...
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