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Therm-a-Rest 20F Down Quilt vs Therm-a-Rest Vesper 32F Ultralite Quilt

Both are Therm-a-Rest down quilts with 900-fill hydrophobic down and 10-denier nylon, so the real split is warmth versus weight. The 20F/-6C quilt carries more fill and an ISO-tested 32F comfort limit, which suits cold sleepers and shoulder-season trips. The Vesper 32F is the lighter, narrower option for warm-weather fastpacking, but owners report down migration and leakage after a few years. Buy the 20F quilt for three-season cold, the Vesper for summer weight savings.

  • Choose the Therm-a-Rest 20F/-6C Down Quilt if you sleep cold, camp in shoulder seasons, or want an ISO-rated comfort limit you can trust below freezing.
  • Choose the Therm-a-Rest Vesper 32F if you count grams on summer trips and mostly sleep in mild weather.

Prices

  • Therm-a-Rest 20F Down Quilt: $309.95 at Amazon (last seen Nov 10)
  • Therm-a-Rest Vesper 32F Ultralite Quilt: $399.95 at Adovvy Demo Store (last seen Nov 9)
  • Difference: the Therm-a-Rest 20F Down Quilt is $90.00 cheaper than the Therm-a-Rest Vesper 32F Ultralite Quilt at the latest prices (Nov 9 and Nov 10)
Therm-a-Rest
Therm-a-Rest 20F/-6C Down Quilt

Therm-a-Rest 20F Down Quilt

Therm-a-Rest 20F/-6C Down Quilt

$309.95at AmazonChecked 15 h ago
See all prices and details
Visit Amazon

As an Amazon Associate, Deal.ai earns from qualifying purchases.

Pros
  • ISO-tested 32F comfort limit
  • 12.5 oz of 900-fill hydrophobic down
  • Semirectangular shape fits taller sleepers
  • 10D ripstop with DWR shell
Cons
  • Heavier than the Vesper
  • No insulated footbox or side baffles listed
  • Less packable
Therm-a-Rest
Therm-a-Rest Vesper 32F/0C Ultralite Down Backpacking Quilt

Therm-a-Rest Vesper 32F Ultralite Quilt

Therm-a-Rest Vesper 32F/0C Ultralite Down Backpacking Quilt

4.5(36 ratings)
$399.95at Adovvy Demo StoreChecked Nov 9
See all prices and details
Visit Adovvy Demo Store
Pros
  • Very light for a down quilt
  • Insulated footbox and perimeter side baffles
  • SynergyLink straps keep it on the pad
  • Packs down small
Cons
  • Narrow cut feels tight for broad sleepers
  • Owners report down migration and leakage over time
  • Straps fit poorly on 25-inch pads
  • Neck closure tab feels weak

What separates them

Therm-a-Rest 20F Down QuiltTherm-a-Rest Vesper 32F Ultralite Quilt
Warmth rating20F/-6C limit with 32F ISO comfortMarketed as 20F but built for warmer three-season use
Fill weight12.5 oz of 900-fill downLighter fill load, about 1.2 lb total weight
Weight1 lb 6 oz regularAbout 1.2 lb
Cut and fitSemirectangular, fits sleepers to 72 inTight, fairly narrow cut, 191 x 147 cm
Draft protectionStandard quilt edgesPerimeter side baffles, snap neck closure, insulated footbox
Pad attachmentPad straps includedRemovable SynergyLink connectors, weak on 25-inch pads
Durability reportsFewer owner complaints about down lossOwners report baffles emptying and down bleeding after about 4 years
Packed size3.7 liters compressedVery small packed size

Price history

$399.95$309.95
Nov 9Nov 11
  • Therm-a-Rest 20F Down Quilt: lowest $309.95 on Nov 9 at Amazon; $309.95 on Nov 11.
  • Therm-a-Rest Vesper 32F Ultralite Quilt: lowest $399.95 on Nov 9 at Backcountry; $399.95 on Nov 11.

Prices at every store

Therm-a-Rest 20F Down Quilt

  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $309.95Free shippingChecked 15 h ago
    Visit Amazon
  • eBayPre-owned

    Availability unknownSold by ch22492669 (100% positive, 150 ratings)Ships from United Kingdom · duties may applyReturns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $360.50+ $68.76 shippingChecked Nov 9
    Visit eBay
  • eBayNew

    Availability unknownSold by dosin-5473 (95% positive, 247 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $444.85Free shippingChecked Nov 9
    Visit eBay

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All 2 stores and price history →

Therm-a-Rest Vesper 32F Ultralite Quilt

  • BackcountryNew

    In stock

    $399.95Free shippingChecked 15 h ago
    Visit Backcountry
  • REINew

    In stock

    $399.95Free shippingChecked 15 h ago
    Visit REI
  • Cascade DesignsNew

    In stock

    $399.95Free shippingChecked 15 h ago
    Visit Cascade Designs
  • Adovvy Demo StoreNew

    In stockReturn policy

    $399.95Checked Nov 9
    Visit Adovvy Demo Store

Also available at

  • Cascade DesignsCheck price at Cascade Designs

Store links may earn us a commission. Some prices via Klarna.

All 8 stores and price history →

Specs compared

SpecTherm-a-Rest 20F Down QuiltTherm-a-Rest Vesper 32F Ultralite Quilt
Temperature Rating (F)20 degrees (F)—
Temperature Rating (C)-6 degrees (C)—
Tested Lower Limit20 degrees (F) - ISO—
Tested Comfort32 degrees (F) - ISO—
WeightRegular: 1 lb. 6 oz.—
Fill900-fill-power Nikwax hydrophobic goose down—
Fill Weight12.5 ounces—
Shell10-denier nylon ripstop with durable water repe…—
Lining10-denier nylon ripstop—
Compressed Volume3.7 liters—
Sleeping Bag ShapeSemirectangular—
Fits Up ToRegular: 72 inches—
Show all 30 specsShow fewer specs
SpecTherm-a-Rest 20F Down QuiltTherm-a-Rest Vesper 32F Ultralite Quilt
Color—Vapor
Temperature Rating—20F
Closure Type—Snap neck closure
Size—Long, Regular
Count—1
Item Weight—0.55 kg
Fill Type—Down
Fill Power—900
Material Type—10D Nylon RipStop (lining fabric)
Material Certifications—

What reviewers say

Therm-a-Rest 20F Down Quilt

Backpackers praise the quilt's low weight, packability and loft for its rating, and many use it comfortably into the 30s. Owners note the missing hood and thin shell as the main trade-offs, and some find the 20F limit optimistic without a warm layer.

What people mention
  • WeightPraisedOwners call it one of the lightest quilts at its rating.
  • PackabilityPraisedIt compresses small enough for a minimal pack.
  • LoftPraisedThe 900-fill down lofts quickly and holds up in damp weather.
  • HoodCriticisedReviewers miss a hood and wear a hat on cold nights.

Therm-a-Rest Vesper 32F Ultralite Quilt

  • 4.5 / 536 ratings

Owners rate it highly for warmth-to-weight, small packed size and freedom of movement compared with mummy bags. Complaints center on long-term durability: down migrating between chambers and leaking, plus straps that don't seal the sides well.

What people mention
  • WarmthPraisedOwners say it is very warm for its weight and comfortable down to about 32F.
  • Pack sizePraisedReviewers note it compresses to a very small packed size.
  • Down migrationCriticisedOne long-term owner found about 8 baffled chambers empty of down after roughly 4 years.

Questions and answers

Which is warmer, the 20F quilt or the Vesper 32F?
The 20F/-6C quilt. It carries more fill and has an ISO comfort rating of 32F, while the Vesper is built for warmer three-season nights.
Which is lighter?
The Vesper. It weighs about 1.2 lb against 1 lb 6 oz for the regular 20F quilt.
Is the Vesper worth stepping up to?
Only if weight and packed size matter more than warmth. The 20F quilt gives more margin on cold nights for a modest weight penalty.
Which lasts longer?
Owners of the Vesper report baffles emptying and down bleeding after about four years. The 20F quilt has fewer such reports, though both use thin 10D fabric.
Will the Vesper fit a wide sleeping pad?
Poorly. Owners say the SynergyLink straps don't work well with 25-inch pads.
Which suits a tall sleeper?
The 20F quilt in regular fits up to 72 inches. The Vesper's narrow cut suits smaller frames better.

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Responsible Down Standard Certified, RDS
Age Group—Adult
Occasion—Camp
Typical Users—Those that carry nothing but the essentials
Fit Style—Tight fit, Fairly narrow cut
Shape—Quilt
Design Highlights—Perimeter side baffles, Insulated footbox
Length—191 cm
Width—147 cm
  • Down leakageCriticisedBuyers report the quilt bled down without any visible holes.