Big Agnes Greystone 20 Down Sleeping Bag

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A warm and cosy down bag the reduces cold spots and drafts from entering the bag. 625g of Down Tek™ and a fill power of 650 gives Greystone 20 comfort limit of -7°.  

Big Agnes says: 

Our Greystone 20° mummy-style sleeping bag delivers high value and performance in a lightweight bag. Ideal for backpacking but versatile enough for couch surfing, it is insulated with DownTek™ and uses baffle construction for efficient heat distribution. If you’re in the market for a mummy shaped bag constructed with high quality, lightweight materials this bag is your ticket to getting out there in comfort and warmth!

Our Verdict

A warm and cosy down bag reduces cold spots and drafts from entering the bag. 625g of Down Tek™ and a fill power of 650 gives Greystone 20 comfort limit of -7°.  It’s a generous-sized bag with plenty of room to toss and turn without the bag feeling constrictive. The Greystone has a nice well-fitting hood, an oversized interior anti-draft collar and an insulated tube along the hood, which all increase the bag’s warmth, and prevent cold air from entering the bag.

This is an excellent 4 season bag, -7°C protection (with a good mat and good thermal layering) at a very reasonable weight and price!

– Reviewed by Ultralight Outdoor Gear

Features

• Our traditional down mummy bags deliver technical, lightweight performance to excel on and off the trail with high thermal value, compressibility, and comfort wherever you go
• Traditional mummy shape allows for lightweight and increased thermal value
• Contoured hood follows the shape of your head for a more comfortable fit
• Oversized interior anti-draft collar
• Low-profile cordlock lets you uncinch the hood with one hand
• Insulated tube along upper hood opening seals out drafts when cinched
• Anti-snag zipper for a smooth, quick zip
• Left zip, 65”/165cm YKK #5 anti – snag locking zipper
• Two-way zipper
• Zipper Garage
• Liner loops
• Mate together left and right zip bags
• Storage sack & stuff sack included
• No-draft collar and no-draft zipper
• Exterior loops for hang drying or storage

Specifications

Temperature Ratings

• Comfort: -7°C / 28°F
• Limit: -9°C / 16°F
• Extreme: -27°C / -17°F

Regular

• Our weight: 1035g (excludes storage bags)
• Fits: 183cm / 6ft
• Brands bag weight: 1.02kg / 2lbs 4oz
• Fill Type: 600 DownTek
• Total fill weight: 539g / 19oz
• Compressed size: 22 x 22cm / 8.5″ x 8.5″
• Stuff Sack Size: 23 x 51cm/ 9″ x 20″

Long

• Our weight: 1133g (excludes storage bags)
• Fits:198cm /6’6″
• Brands bag weight: 1.11kg / 2lb 7oz
• Fill Type: 600 DownTek
• Total fill weight: 595g / 19oz
• Compressed size: 23 x 23cm / 9″ x 9″
• Stuff Sack Size: 23 x 51cm/ 9″ x 20″

Material & Construction

• Shell: GRS certified recycled 20D 400T polyester ripstop with PFC-free water-repellent finish
• Lining: GRS certified recycled 20D 380T polyester taffeta with PFC-free water-repellent finish
• Baffled construction
• 600 fill DownTek™ repels water while maintaining insulating value – bluesign® Certified PFC-free water-repellent chemistry
• YKK #5 zipper

Help & advice:

• The Ultimate Guide to Lightweight Sleeping Bags
• Time-Saver Guide to Choosing a Sleeping Bag
• The EN13537 Standard
• About Big Agnes
• Big Agnes Sleeping Bags Buying Guide
• All About Down
• What is Bluesign?
• Why is ‘PFC Free’ Important?