You have your hammock. You have your sleeping bag. You head out for your first overnight hang and discover something nobody warned you about: your back is freezing.
Welcome to the cold bottom problem. It catches nearly every new hammock camper off guard, and the solution comes down to two main options — a sleeping pad or an underquilt. Both work, but they work very differently, and the right choice depends on how you camp.
After 15 years of hammock camping through Scandinavian seasons, here is our honest comparison.
The Cold Bottom Problem Explained
When you lie in a hammock, your body weight compresses the sleeping bag beneath you. Compressed insulation does not trap air, and air is what keeps you warm. The result is a strip of nearly zero insulation between you and the cold air below.
On a warm summer night, you might not notice. But once the temperature drops below 15°C, the cold bottom becomes impossible to ignore. By 5°C, it can make sleeping genuinely miserable. Below freezing, it becomes dangerous.
You need something that insulates from below without being crushed by your body weight. That is where sleeping pads and underquilts come in.
The Sleeping Pad Approach
A sleeping pad sits inside the hammock, between you and the fabric. It provides a layer of insulation that your body weight does not fully compress (especially inflatable pads with baffles).
Pros
- Affordable — You may already own one from ground camping. A basic foam pad costs under €30.
- Dual-purpose — Works on the ground and in a hammock, useful for hybrid trips.
- Available everywhere — Any outdoor shop carries sleeping pads.
- Works when wet — Foam pads are unaffected by moisture.
Cons
- Slides around — Pads move on the slippery hammock fabric. You wake up with the pad bunched to one side and your hip on cold nylon.
- Cold spots at the edges — Pads do not wrap around you. Your sides and shoulders often hang beyond the pad edge.
- Ruins hammock ergonomics — The diagonal lay that makes hammocks comfortable requires you to shift freely. A pad restricts movement and creates an uneven surface.
- Noise — Inflatable pads crinkle and squeak on nylon every time you move.
- Puncture risk — Inflatable pads can develop leaks, leaving you with no insulation at 3am.
The Underquilt Approach
An underquilt hangs beneath the hammock, suspended from the hammock suspension or ridgeline. It wraps around the outside of the hammock fabric, creating a cocoon of insulation that your body weight never touches.
Pros
- Full coverage — Wraps around and beneath you, eliminating cold spots from every angle.
- Stays in place — Suspended independently, it does not shift when you move.
- Preserves hammock comfort — Nothing inside the hammock to interfere with your lay position.
- Set and forget — Hang it once and it stays put all night.
- Superior warmth — Uncompressed insulation performs at its rated temperature, unlike a pad being partially crushed.
Cons
- Cost — A quality down underquilt is a significant investment, typically €150-350.
- Single purpose — Designed specifically for hammocks. Not useful for ground camping.
- Down and moisture — Down underquilts lose insulation value when wet (though modern DWR coatings help significantly).
- Learning curve — First-time setup takes a few minutes to get the hang right.
Head-to-Head Comparison
| Factor | Sleeping Pad | Underquilt |
|---|---|---|
| Warmth | Good (with gaps) | Excellent (full wrap) |
| Comfort | Fair (slides, restricts movement) | Excellent (nothing inside hammock) |
| Weight | 300-600g (inflatable) | 300-800g (down) |
| Pack Size | Medium | Small to medium (down compresses well) |
| Price | €20-150 | €150-350 |
| Setup | Instant (place in hammock) | 2-5 minutes (hang and adjust) |
| Stays in place | No (slides on fabric) | Yes (independent suspension) |
| Versatility | Works on ground too | Hammock only |
| Cold weather performance | Limited below 0°C | Excellent to -15°C and beyond |
When a Sleeping Pad Makes Sense
A sleeping pad is the right choice in certain situations:
- Budget camping — If you are trying hammock camping for the first time and do not want to invest heavily, a pad you already own is a free solution.
- Hybrid trips — If your trip mixes ground camping and hammock camping, a pad serves both setups.
- Summer only — In warm weather (above 15°C), the cold bottom problem is mild and a pad handles it adequately.
- Testing the waters — Before committing to a dedicated hammock setup, using a pad lets you try hammock camping without extra investment.
When an Underquilt Wins
An underquilt is the better choice for:
- Dedicated hammock camping — If you have committed to the hammock life, an underquilt is the proper insulation solution.
- Cold weather — Below 10°C, the difference between a pad and an underquilt becomes dramatic. Below freezing, an underquilt is essentially mandatory for comfortable sleep.
- Comfort priority — If sleeping well outdoors matters to you, the underquilt approach is noticeably superior.
- Multi-night trips — On longer trips, consistent sleep quality makes or breaks the experience. An underquilt delivers reliable warmth night after night.
- Tall or broad campers — An underquilt wraps around you regardless of size. A pad only covers its own surface area.
The Verdict
If you are testing hammock camping for the first time on a summer trip, throw a sleeping pad in your hammock and see how you like it. It works well enough for warm weather and costs nothing extra.
But if you are serious about hammock camping — especially in spring, autumn, or winter — an underquilt is the clear winner. The comfort difference is not subtle. It is the difference between fighting your gear all night and sleeping soundly.
The sliding, the cold spots, the restricted movement of a sleeping pad all disappear when you switch to a proper underquilt. Most experienced hammock campers will tell you it was the single biggest upgrade to their setup.
If you are ready to make the switch, the Jord Underquilt delivers full-coverage insulation with 850FP RDS-certified down, dimensions that fit campers up to 200cm, and three temperature variants for every season. See our underquilt collection and experience the difference proper insulation makes.
