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Momo Jord
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Free tool · Field-tested ratings

Which underquilt do you need?

Tell us tonight's low, how exposed your spot is and how you sleep. We'll match you to the lightest Momo Jord underquilt that keeps your back warm — using honest Comfort ratings, not inflated system numbers.

Honest Comfort ratings Wind-adjusted 208 × 142 cm coverage
A Momo Jord underquilt slung beneath a hammock in a Nordic forest at golden hour
850 FP · RDS downFull-length H-baffle · designed in Sweden

Build tonight's night

5 quick inputs
1 · Tonight's forecast lowThe coldest it'll get, not the daytime high.
−2°C Cool night
−25 °C · arctic0 °C+20 °C · mild
2 · Exposure & windWind matters more in a hammock — you're suspended in moving air.
3 · How you sleepBe honest about your coldest nights.
4 · What you wear to bedA small margin — not a substitute for the quilt.

Clothing helps mostly your top, sides and extremities. Under you in the hammock it compresses under your weight, so it does little for the under-side — that's the underquilt's job. Treat clothing as margin, not a substitute for the right underquilt.

5 · Your top insulationTopquilt or sleeping bag. A hammock is two halves — cold enters at the weaker one.

No credit-stacking. Some brands quote a colder number only if you also buy a matching topquilt — crediting the topquilt's warmth to the underquilt. We don't. Our Comfort figure is the under-side rating; pair it with top insulation of at least the same rating and your system reaches that number.

The lineup

Four quilts, one honest scale

Every Momo Jord underquilt is 850 fill-power RDS-certified down in a full-length H-baffle shell. We publish the Comfort rating as the headline — the temperature a typical sleeper stays warm at — with the Limit as a secondary spec for hardy sleepers with good top insulation.

ModelComfortLimitBest forDown fill
UQ300Your pickSummer +5 °C+2 °C Summer & warm nights300 g
UQ400Your pickLightweight Warmth 0 °C−3 °C Cool shoulder season400 g
UQ500Your pickSpring to Fall −2 °C−6 °C 3-season (−5 °C with a topquilt)500 g
UQ800Your pickAll-Year Warmth −10 °C−15 °C Deep cold, winter hangs800 g

Why our quilts punch above their number

Two underquilts can share a fill weight and still sleep worlds apart — coverage is where the cold sneaks in. A quilt that's too short leaves your legs and shoulders hanging in the air; one that's too narrow lets draughts curl up the sides.

Every Momo Jord underquilt is full-length: 208 × 142 cm — 2.95 m² of down. That's longer and wider than many hammock underquilts on the market, which run shorter or narrower to save grams. The result is simpler and honest: more consistent contact with the hammock, fewer cold spots, and no scramble at 3 a.m. to chase a draught up your back.

Length
208 cm
Width
142 cm
Coverage area
2.95 m²
Down
850 FP · RDS
An honest note on the numbers

Estimates, not lab certificates

These are field-informed estimates, not lab EN/ISO-tested ratings — and no underquilt is, because the EN 13537 standard assumes a sleeper on a ground pad, not hanging in a hammock. Anyone quoting an "EN-rated" underquilt is stretching the truth.

Real-world warmth shifts several degrees with wind, hammock fit, your metabolism and — above all — your top insulation. We publish Comfort figures, never inflated "with-topquilt system" numbers designed to look colder-capable than they are.

So treat the recommendation as a smart starting point: choose about 5 °C of headroom, be honest about your coldest night, and remember an underquilt only solves half the system — you always need warmth on top too.

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