Sierra Designs Cloud 20 Review (2026)

Name: Sierra Designs Cloud 20
Brand: Sierra Designs
Price: 200.00 USD
Availability: InStock
Rating: 8.2 (1 reviews)

Sierra Designs' Cloud 20 skips the zipper entirely, using a comforter-style overlapping closure that eliminates the classic zipper snag frustration and the small drafts that leak through even a well-designed zipper. It takes a bit of an adjustment for side sleepers and anyone who likes fully unzipping a bag to use as a blanket, but the tradeoff delivers genuinely good warmth-to-weight performance at a below-premium price.

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$200 retail

8.2

/10

TrailCraft Score

What Works

Zipperless design eliminates zipper snags and zipper-line drafts entirely
1lb 15oz at 20°F comfort is a good warmth-to-weight ratio for the price
$200 undercuts most 700+ fill power competitors
Simple design with fewer failure points than a zippered bag

Limitations

No zipper means less flexibility to use it fully opened as a blanket
Takes an adjustment period for hikers used to traditional zippered bags
Getting in and out is slightly less convenient than unzipping fully
Fewer venting options on warm nights without a zipper to partially open

Specifications

Fill Power700 fill power down

Weight1 lb 15 oz / 879 g

Temp Rating20°F comfort

ZipperNo zipper, integrated comforter-style closure

HoodAdjustable hood with drawcord

Shell20D ripstop nylon

WarrantyLimited lifetime

OriginMade in Vietnam

Score Breakdown

Warmth

8.4

Weight / Compression

8.5

Build Quality

8.3

Value for Money

7.1

Brand & Warranty

8.2

What Sets It Apart

It takes a bit of an adjustment for side sleepers and anyone who likes fully unzipping a bag to use as a blanket, but the tradeoff delivers genuinely good warmth-to-weight performance at a below-premium price.

1lb 15oz, $200 — a zipperless design that eliminates zipper snags and drafts entirely

Who This Is For

The Sierra Designs Cloud 20 is right for hikers whose priorities match its design: built around zipperless design, at 1 lb 15 oz and $200.

A note on pricing and links: Prices listed are current as of July 2026 and may change. Some links on this page are affiliate links — if you buy through them, I earn a small commission at no extra cost to you. It does not change my ranking.

How It Compares

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All options in this category ranked side by side — specs, scores, and pricing.

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Common Questions

How do you get in and out of a zipperless sleeping bag?

The Cloud 20 uses an overlapping comforter-style closure you slide into similar to getting into a sleeping bag-shaped blanket, rather than unzipping and re-zipping — it takes a night or two to get used to.

Does a zipperless design actually feel warmer?

Many users report fewer drafts specifically along the zipper line, which can genuinely improve perceived warmth compared to a bag with an imperfectly sealed zipper.

Can I use the Cloud 20 fully opened as a blanket like a zippered bag?

Not as easily — the overlapping closure design isn't intended to fully flatten out the way a zippered bag can when fully unzipped, which is the main tradeoff for eliminating the zipper.