• Mummy sleeping bags

    • A mummy sleeping bag is the most efficient way to carry warmth in the mountains. The tapered cut, close footbox and a shaped hood minimise dead air and heat loss while keeping pack size low — the core of any dependable sleep system for alpine trekking, ski tours and long bikepacking routes.

Filter By

Filter By

Price

Price

  • 308.00 € - 1,369.00 €

Color

Color

Size

Size

Why a mummy style sleeping bag is more efficient

By reducing empty space around the torso and legs, a mummy shape sleeping bag traps heat faster and wastes fewer calories. A snug shoulder line, a 3D hood and an anatomically cut footbox reduce cold spots and drafts — exactly what you want when temperatures drop at altitude.

Down mummy sleeping bag vs synthetic: what matters on the trail

For multi-day routes where every gram counts, a down mummy sleeping bag delivers the best warmth-to-weight and compressibility. In PAJAK’s range you’ll find high-fill, RDS-certified 900 cuin down in the Radical series and durable 700 cuin duck down in the Core series.

Lightweight or winter mummy sleeping bag?

Pick by temperature, weight and trip style — here’s how the current PAJAK range maps to common use-cases:

- Lightweight mummy bag (fast & light, late spring to early autumn): Radical 1Z (0°C) — 440 g, 900 FP goose down.
- All-round, colder seasons and light winter with skills: Radical 4Z (–7°C, 720 g) — 900 FP goose down, 3D down-filled zipper and collar baffles, waterproof-coated inserts in hood/foot.
- Versatile performance with hard-wearing spec: Core 400 (–6°C) — 800 g, fill 470 g, 700 CUIN 90/10 duck down, TORAY Airtastic SLF15 DWR shell; waterproof reinforcements in hood/foot.
- Winter mummy sleeping bag (deep cold, multi-day winter routes): Core 950 (–18°C) — fill 1050 g, ~1400 g total, 700 CUIN 90/10 duck down, TORAY Airtastic SLF15 DWR.
- Expedition-grade extreme cold: Radical 16H — 900 FP goose down with IRL (Infrared Reflection Layer); 1500 g, fill 1050 g. Temperature ratings: comfort –31°C / limit –43°C / extreme –73°C (ISO 23537).

Mummy sleeping bags for adults: sizing and fit that actually works

All models in this category are mummy sleeping bags for adults and offer Short / Regular / Long options to fine-tune internal length and shoulder width — a key factor in thermal efficiency and all-night comfort.

Practical buying checklist (built for real routes)

- Temperature rating vs itinerary: align comfort/limit with expected lows (check the rating type on each page).
- Fill & fill weight: higher CUIN = better loft per gram; fill weight = total insulating mass (e.g., Core 950 1050 g).
- Shell & moisture management: DWR shells and targeted reinforcements (hood/foot) handle condensation and damp ground.
- Packability & total weight: if you chase vertical with long days, Radical 1Z’s 440 g is hard to beat.
- Fit: choose the correct length (Short/Regular/Long) to avoid dead space.

Field-tested confidence

Designed for European mountain conditions, with product development based on laboratory research and field tests — and the tech details (3D draft collars, non-blocking zips, waterproof inserts) solve real campsite problems.

A mummy sleeping bag remains the most efficient path to warmth with a small pack size. Whether you need a lightweight mummy sleeping bag, a versatile three-season tool, or a winter mummy sleeping bag for deep cold, PAJAK’s adult range covers the spectrum with proven down, precise construction and sizes that fit.