Mountain Hardwear Banshee SL 0°

3 reviews
5-star:   3
4-star:   0
3-star:   0
2-star:   0
1-star:   0


Regular Long
Weight 3 lb 6 oz / 1530 g 3 lb 10 oz / 1650 g
Fill weight 1 lb 8 oz / 680 g 1 lb 10 oz / 740 g
Loft 7 in / 18 cm 7 in / 18 cm
Temperature rating 0 F / -20 C 0 F / -20 C
Fill 800 Fill-Power Down 800 Fill-Power Down
Shape Mummy Mummy
Max User Height 6 ft 0 in / 180 cm 6 ft 6 in / 200 cm
Shoulder girth 62 in / 157 cm 63 in / 160 cm
Hip girth 58 in / 147 cm 59 in / 150 cm
Foot girth 38 in / 97 cm 40 in / 102 cm
Price $500.00 USD $520.00 USD



I cannot envision a better product or company. First…

Rating: rated 5 of 5 stars
Price Paid: 550

I cannot envision a better product or company. First the product: How could a bag keep you any warmer for the same weight?  

Mountain Hardware has pulled out all of the stops: 800 fill down, hood and a neck baffle, The zipper is covered with a outer flap, and has an inner, down filled baffle.  Conduit SL really adds water resistance to the bag.  The welded seams are strong (though the stitched ones had a problem on one of my bags - more later).  

Overall, it's just an amazing product.  I've never been cold - even at temperatures below rated temperatures (keep in mind, though, I was using the previous model, which was rated to 15degrees.  In my current 0 degree bag, I have not been anywhere below 0 degrees).  

Finally, it is a thing of beauty.  The attention to detail, and the craftsmanship is just amazing.

Now, about the company: I had the original 15 degree bag that I was so happy with.  Perfect fit for my 5'10" frame.  Unfortunately, after a few years of use, it needed a wash.  I followed the wash procedure (front loader, Nikwax "down wash" detergent), and two things happened: several sewn seams split, and the conduit SL coating disintegrated.  

I believed that I had followed all of the recommended procedures, and on the phone Mountain Hardware agreed that Nikwax is OK to use.  Maybe I had a defective bag?  Regardless, Mountain Hardware took care of it for me.  Everyone I talked to in customer support was friendly, helpful and patient... and they made the entire procedure painless.  How many companies do you know that have awesome products and stand behind them like that?  

One final thing... my recommendation: If you decide to wash your bag, try gently hand washing the fabric first (rather than immersing the entire bag).  Getting the down wet may decrease its loft, and washing, is generally hard on a bag (I learned this from subsequent internet research).  In my opinion, this applies to all bags.  

Also, I'd call Mountain Hardware to ask which detergent they recommend the most, as I have concerns that the Nikwax may have been the cause of the Conduit SL disintegration.


Have used this bag on several cold weather camping…

Rating: rated 5 of 5 stars
Design: Mummy
Fill: 800 fill down
Temperature Rating: 0 F
Weight: 3 lbs, 6 oz
Price Paid: $300

Have used this bag on several cold weather camping trips and it has been great. The zero degree (F) rating is right on - even kept me warm with just a 3-season ground pad and 5F temps. Conduit shell repels any wetness you can throw at it without losing any lofting ability. Laminate means no cold spots due to stitching. Plenty of room to roll around (even with extra clothing and a water bottle stuffed inside) and the footbox seems extra roomy.

Only con is the zipper occasionally gets stuck - but doesn't just about every sleeping bag zipper?


I don't like to take a tent when I am trying to go…

Rating: rated 5 of 5 stars
Price Paid: $425

I don't like to take a tent when I am trying to go light and have been in rain without getting wet at all. I just put a gore-tex jacket over the hole and stayed totally dry. I have also done winter camping with it and slept with no cave or tent, just on a therma rest pad and stayed warm with no hint of cold spots with tempuratures right around 0.

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Manufacturer's Description

Visit Mountain Hardwear's Banshee SL 0° page.

Retailers' Descriptions

Here's what other sites are saying:

Mountain Hardwear's Banshee is an expedition bag that sets the standard for winter mountaineering. Built with Mountain Hardwear's waterproof, incredibly breathable, Dry Q fabric, Mountain Hardwear's expedition bags are the perfect choice for alpine expeditions. Constructed with a hidden sealed baffle construction we have eliminated the need for top shell seams. Insulated with 800 fill down, sealed for warmth with an ergonomic collar, and sporting a comfortable foot box.


The Mountain Hardwear Banshee is a premier expedition bag with 800-fill Q.Shield Down. This bag is designed for exstreme cold, has heat savings technologies and is breathable and air-permeable. Q Shield(TM) 800 fill down has an advanced treatment applied that resists heat robbing moisture and retains maximum loft in damp conditions Dry.Q(TM) Elite shell is waterproof, breathable, windproof, durable and lightweight Six-chamber hood design maintains even loft around head for consistent warmth Ergonomic draft collar blocks the escape of heated air from inside the bag Two small pockets above collar provide storage for small items Double draft tubes along zipper prevent cold spots Comfort footbox follows natural foot position for maximum warmth and comfort Storage sack and stuff sack included

- OMCgear

Mountain Hardwear Banshee 0F Down Sleeping Bag - Long Size Left HandThe Mountain Hardwear Banshee 0F Down Sleeping Bag is your bed in a bag. Sleeping on this bag makes you feel like you are at home as it features technologies that keep you warm and comfortable despite the harsh and cold outdoor setting. It features the Q Shield 800 fill down and Dry.Q Elite shell to maintain heat even in wet conditions. It is completely waterproof with its welded seams and hidden baffle construction. The external double zipper flaps are laminated to keep water out. As you are kept dry, this bag provides comfort as well by properly supporting your neck, shoulders, and foot with its ergonomic draft collar and comfort foot box respectively. Two small pockets are included for storing and keeping your small items within reach. Never settle for anything less, buy now and bring the Mountain Hardwear Banshee 0F Down Sleeping Bag in your next outdoor trip.

- SunnySports

Plan your trip, gather your expedition partners, and set off into the mountains with the Mountain Hardwear Banshee Sleeping Bag. The Banshee sleeping bag is worthy of the elite cold-weather camper, and as such it boasts a fully waterproof breathable shell on the outside and water-repellent down insulation on the inside. Water repellency allows this down insulation to resist moisture and maintain high loft in wet weather--a trait uncommon to other varieties of down insulation. Go deep into the mountains with this zero-degree sleeping bag and slumber soundly while nasty weather rages around you.