DownTo1 Packs

The engine's answer

Best sleeping bag in mild summer nights, under €700

Cumulus

Lite Line 300

A summer down bag made to order in Poland, and barely there.

  • Very light and very compressible for the warmth
  • Made to order, including length and fill options
  • Excellent value for genuine 850 fill power
  • Summer only — it runs out around freezing
  • Lead time rather than off-the-shelf availability

Find it at Bergfreunde · Trekkinn · Decathlon · Alpinetrek · eBay (used)

Why it wins, in numbers

Cumulus Lite Line 300 is the sleeping bag the engine picked for this trip: €330 and 600 g, Comfort rating 2 °C, a 50% match on the questions asked. The kit around it comes to €550 of the €700 ceiling, leaving €150.

What the engine asked for: a sleeping bag rated to 6 °C or lower, a mat with an R-value of at least 1.5, a pack of at least 37 L, and €700 for all four; anything that falls short of these is flagged beside the item.

The kit it belongs to

Four items chosen together, not four separate winners. Swapping one moves the others.

3.68 kg on your back · €550 of a budget of €700

Tent
3F UL Gear Lanshan 2: €130, 1.10 kg, Season rating 3, 50% match.
Sleeping bag
Cumulus Lite Line 300: €330, 600 g, Comfort rating 2 °C, 50% match.
Sleeping mat
Forclaz MT500 Foam: €30, 480 g, R-value 2.0, 50% match.
Backpack
Forclaz MT100 Easyfit 50: €60, 1.50 kg, Capacity 50 L, 50% match.

What the runners-up gave up

Each of these still leaves a kit that closes — the budget holds and the pack shuts. This is where each one lost.

  • Cumulus Panyam 450The three-season sweet spot, if you can wait for it to be built.Cumulus Panyam 450 — €440, 890 g — gives up Packed size: 6.0 L against the winner's 4.0 L. It scores 50% to the winner's 50%.
  • Rab Neutrino 400A well-sorted three-season bag with a properly water-resistant shell.Rab Neutrino 400 — €470, 830 g — gives up Price: €470 against the winner's €330. It scores 50% to the winner's 50%.
  • Mountain Equipment Helium 400A long-standing British three-season bag with a good record.Mountain Equipment Helium 400 — €450, 870 g — gives up Weight: 870 g against the winner's 600 g. It scores 50% to the winner's 50%.

Questions this trip raises

How much does the whole kit cost?
€550 for all four items, €150 under the €700 ceiling. Prices are indicative euro list prices; the shops set their own.
How much does it weigh?
3.68 kg base weight — tent, sleeping bag, mat and pack together, before food, water and clothes. The pack is rated to carry 16 kg comfortably.
Is Cumulus Lite Line 300 warm enough for 8 °C nights?
Its comfort rating is 2 °C. For nights near 8 °C the engine requires a rating of 6 °C or lower, which it meets.

Change an assumption

This page answers one trip. Yours is not that trip — adjust the nights, the budget or the company and watch all four re-rank.

Build my kit

Specifications are manufacturers’ own published figures and prices are indicative, not live. Comfort ratings and R-values are comparable across brands but describe a standardised sleeper on standardised ground — neither is a promise about you on a particular night. Check the current spec and price with the retailer before buying.