Western Mountaineering Bristlecone RZ Microfiber Sleeping Bag
- -10 F rating, listed as winter
- 6 ft 6 in, right zip, user height up to 77 inches
- 850+ goose down, 8.5 inch loft
- 69 / 61 / 48 inch shoulder, hip and foot girth
- 4 lb 3 oz total weight
- Two zippers, semi-rectangular shape
- 10 x 20 inch stuff size
Updated 23 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A roomy winter down bag with two zippers, a collar and a draft tube. It is big and heavy, and the weight and fill figures in the listing disagree.
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ASIN: B0178QPL7ACategory: Sleeping Bags
Overview
A winter camp is where the Bristlecone belongs: a roomy, semi-rectangular bag filled with high fill power goose down. Two zippers let it open out flat or join with the brand's mummy bags. A down-filled collar and a large draft tube block cold air.
The extra room is its character. It gives room to move and can zip to the brand's mummy bags. The listing contradicts itself on weight and fill, so the numbers should be confirmed before relying on them.
Who it's for
Cold-weather campers who feel boxed in by mummy cuts will enjoy the width. Light-and-fast hikers should choose a narrower, lighter bag.
Pros and cons
- Roomy semi-rectangular cut
- High fill power goose down
- Large draft tube
- Heavy to carry
- Weight and fill figures conflict
- Right zip only in this size
Performance notes
The loft traps warm air, and the collar plus draft tube close the openings at the neck and zipper. A roomier cut leaves more air to warm than a mummy does, so the bag relies on its depth of loft to hold heat.
Specifications
| Brand | Western Mountaineering |
|---|---|
| Dimensions & fit | |
| Maximum Height Recommendation | 77 incheshigher than 56% of 33 sleeping bags |
| Size | 6'6" Right Zip |
| Item weight | 4 lb 3 ozhigher than 69% of 33 sleeping bags |
| Stuff size | 10 x 20 inches |
| Capacity & performance | |
| Temperature Rating | -10 Flower than 86% of 22 sleeping bags |
| Construction & materials | |
| Fill Material Type | 850+ goose down |
| ShellMaterial | MicroLite XP (polyester microfiber) |
| Warranty & support | |
| Warranty Description | Limited Warranty |
| Other details | |
| Shape | Semi-Rectangular |
| Seasons | Winter |
| Inside girth | 69 / 61 / 48 inches |
| Loft | 8.5 inches |
Closest rivals on specs
Kelty Mistral Synthetic Sleeping Bag- Item weight 4.2 vs 3.3 pounds (+27%)
Teton Celsius Regular Sleeping Bag- Item weight 4.2 vs 5 pounds (-16%)
Frequently asked questions
Is the Bristlecone a mummy bag?
No. The shape is listed as semi-rectangular. With two zippers it can be zipped to the brand's mummy bags or unzipped to lie flat.
How much does the Bristlecone weigh?
The seller copy gives 4 lb 3 oz in the size sheet and 3 lbs 15 oz in the text, while the item weight field says 3 pounds. The listing does not reconcile them.
How warm is the Western Mountaineering Bristlecone?
It is rated to -10 F in the seller copy, with a winter season listed and 8.5 inches of loft.