Therm-a-Rest Hyperion 20F/-6C (Regular) vs Zpacks Zip Around Quilt 20°F

Weight and specs compared for 2026 — and which one to choose.

Therm-a-Rest Hyperion 20F/-6C (Regular) is the lighter option — 45 g lighter than the Zpacks Zip Around Quilt 20°F (7% less weight). If grams matter to you, that is the one to beat.

Spec	Therm-a-Rest Hyperion 20F/-6C (Regular)	Zpacks Zip Around Quilt 20°F
Weight	567 g · 0.567 kg · 1.25 lb	612 g · 0.612 kg · 1.35 lb
Brand	Therm-a-Rest	Zpacks
Category	Sleep System	Sleep System

Therm-a-Rest Hyperion 20F/-6C (Regular)

567 g

Ultralight 20F down mummy bag with 900-fill Nikwax Hydrophobic Down for fast-and-light backpacking.

Check price Full details →

Zpacks Zip Around Quilt 20°F

612 g

Down quilt rated to 20°F with 900-fill power down and 412g of fill. Unique zip-around attachment system. Popular choice for thru-hikers seeking versatility.

Check price Full details →

Therm-a-Rest Hyperion 20F/-6C (Regular) vs Zpacks Zip Around Quilt 20°F: which should you buy?

If saving weight is your priority, the Therm-a-Rest Hyperion 20F/-6C (Regular) wins — at 567 g it is 45 g (7%) lighter than the Zpacks Zip Around Quilt 20°F (612 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest sleep system page, or browse the full gear weight database.

More sleep system comparisons

Therm-a-Rest Hyperion 20F/-6C (Regular) vs Sea to Summit Aeros Ultralight Pillow (Regular) Therm-a-Rest Hyperion 20F/-6C (Regular) vs NEMO Equipment Tensor Elite Sleeping Pad Therm-a-Rest Hyperion 20F/-6C (Regular) vs Therm-a-Rest NeoAir UberLite Therm-a-Rest Hyperion 20F/-6C (Regular) vs NEMO Tensor Elite Ultralight Insulated Therm-a-Rest Hyperion 20F/-6C (Regular) vs Zpacks Solo Quilt 20F Therm-a-Rest Hyperion 20F/-6C (Regular) vs Nemo Tensor Ultralight