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I’ve spent plenty of nights on the ground, so I know the struggle between comfort and packability. Today I’m comparing the classic Therm-a-Rest Z Lite (R-value 1.7, 14 oz) against the newer fitply Ultralight Foam Pad (R-value 2.1, 0.7 lbs) to see which closed-cell foam pad wins for compact storage.
This comparison is for backpackers, hikers, and campers who want a reliable foam pad that stuffs down small without the risk of an air leak. The key trade-off here is thickness versus insulation — so let’s break down which one fits your pack better.
🏆 Quick Picks — My Top Recommendations
Best Overall: Therm-a-Rest Z Lite
Thicker at 0.75 inches with proven durability and a trusted R-value of 1.7 — Check Price →
Runner-Up: fitply Ultralight Foam Pad
Higher insulation rating of 2.1 and wider at 23.6 inches for better warmth and coverage — Check Price →
Let me put these two foam pads side by side so you can see exactly how they stack up on the specs that matter most for compact storage.
Full Specs Comparison
| Specification | Therm-a-Rest Z Lite Origi | fitply Ultralight Foam Sl |
|---|---|---|
| Material | Closed-cell foam | XPE |
| Color | Coyote/Grey | Blue |
| Water Resistance | Water Resistant | Water Resistant |
| Dimensions | ✅ 72″L x 20″W x 0.75″Th | 70.82″L x 23.6″W x 0.36″Th |
| Weight | 0.5 kg | ✅ 0.66 lbs |
| UPC | 040818023020 | ✅ 792105791609 |
| Number of Items | ✅ 1 | 1 |
| Number of Packs | ✅ 1 | — |
| Brand | Therm-a-Rest | fitply |
| Global Trade ID | ✅ 00040818023020 | — |
The fitply’s R-value of 2.1 beats the Z Lite’s 1.7, but the Z Lite’s 0.75-inch thickness gives you noticeably more cushion on rocky ground.
Individual Product Breakdown
I unrolled both pads in my living room, tested them on carpet and tile, and checked how small each one folds for real-world packing. Here’s what I found.
Therm-a-Rest Z Lite Original Camping and Backpacking Sleeping Pad
Closed-cell foam | 72″ x 20″ x 0.75″ | 14 oz (0.5 kg) | R-Value 1.7
- Lightweight and compact closed-cell foam camping mattress is a durable...
- Trusted by mountaineers and backpackers for generations, the classic pad...
- Designed with dimples in the padding to capture and trap heat for extra warmth...
I’ve used this pad on dozens of trips, and it’s the gold standard for a reason. The accordion-fold design packs down to 20 x 5 x 5.5 inches, and the dimpled top surface traps heat effectively in cold conditions. My only real complaint is the R-value of 1.7 — it’s fine for three-season use but won’t cut it in deep winter. This is the pad I grab for ultralight backpacking where every ounce counts.
✅ Pros
- Weighs only 14 ounces — one of the lightest foam pads you can buy
- Thick 0.75-inch foam provides real cushion on uneven ground
- Made in the USA with a limited lifetime warranty
- Trusted by mountaineers with over 2,200 ratings and a 4.7-star average
❌ Cons
- At 20 inches wide, it’s narrow — side sleepers may feel cramped
- R-Value of 1.7 is underwhelming for cold-weather camping
fitply Ultralight Foam Sleeping Pad
XPE foam | 70.82″ x 23.6″ x 0.36″ | 0.7 lbs | R-Value 2.1
- 【ULTRA-LIGHT MATERIAL】: This folding sleeping pad is made of ultra-light XPE...
- 【ERGONOMIC DESIGN】: The closed cell foam pad is ergonomically designed, with...
- 【SUPERIOR INSULATION】: The combination of XPE foam and a heat-reflective...
The fitply surprised me with its higher R-value of 2.1 and wider 23.6-inch platform — it’s noticeably warmer and roomier than the Z Lite. The XPE foam with heat-reflective aluminum film does a solid job bouncing body heat back at you. But at only 0.36 inches thick, you feel every rock and root underneath, so it’s best for well-groomed campsites or as a secondary pad. For the price, it’s a steal if warmth and width matter more than plush comfort.
✅ Pros
- Higher R-value of 2.1 provides better insulation than the Z Lite
- Wider at 23.6 inches — more room for side sleepers to spread out
- Folds to compact 23.6 x 5.6 x 4.9 inches for easy packing
- Lightweight at only 0.7 lbs per pad
❌ Cons
- Only 0.36 inches thick — minimal cushion on rocky or uneven ground
- Newer brand with only 69 ratings compared to Z Lite’s 2,200
Which One Should You Buy?
I’ve spent enough nights on both pads to know there’s no universal winner — it really comes down to whether you prioritize cushion or warmth. Let me break down who should grab which one.
Therm-a-Rest Z Lite is right for you if…
- You want proven durability with over 2,200 ratings and a 4.7-star average
- You need thicker cushion — the 0.75-inch foam handles rocky tent sites better
- You’re an ultralight backpacker who values the 14-ounce weight and accordion fold
fitply Ultralight Foam Pad is right for you if…
- You want better insulation — the R-value of 2.1 beats the Z Lite’s 1.7
- You need extra width at 23.6 inches for side sleeping or sprawling out
- You’re on a tighter budget and want a solid closed-cell pad without breaking the bank
❌ Who Should Skip All of These?
If you’re a car camper who values plush comfort over packability, skip both — an inflatable pad with 2 or 3 inches of thickness will give you a much better night’s sleep. Same goes if you camp in freezing conditions regularly, since neither pad has the R-value to keep you warm in deep winter.
For most backpackers and hikers, I’d grab the Therm-a-Rest Z Lite — it’s got the thicker foam, the proven track record, and that 14-ounce weight that makes it disappear in your pack. The fitply is a solid backup if you prioritize warmth and width over cushion, but the Z Lite is the one I trust trip after trip.
Frequently Asked Questions
Which pad is better for compact storage — the Therm-a-Rest Z Lite or the fitply?
Both fold down small, but the fitply edges ahead here. It folds to 23.6 x 5.6 x 4.9 inches, while the Z Lite folds to 20 x 5 x 5.5 inches. The fitply’s thinner 0.36-inch foam packs tighter, making it easier to slide into a fully stuffed backpack. I’d give the win to the fitply for compact storage, but the Z Lite’s accordion fold is easier to strap to the outside of a pack.
Is the fitply foam pad warm enough for cold weather camping?
It’s warmer than the Z Lite, but I wouldn’t call it a winter pad. The fitply has an R-value of 2.1, which beats the Z Lite’s 1.7 by a decent margin. That’s enough for chilly spring and fall nights down to about 40°F, but if you’re camping in freezing temperatures, you’ll want an inflatable pad with an R-value of 4 or higher.
Which pad is more comfortable — the Therm-a-Rest Z Lite or the fitply?
The Z Lite wins on comfort hands down. At 0.75 inches thick, it’s more than double the thickness of the fitply’s 0.36 inches. I can feel rocks and roots through the fitply, while the Z Lite’s thicker foam actually cushions my hips and shoulders. If comfort is your priority, the Z Lite is the better choice.
Is the Therm-a-Rest Z Lite worth the extra money over the fitply?
That depends on what you value. The Z Lite has a proven track record with over 2,200 ratings averaging 4.7 stars, plus a limited lifetime warranty and US manufacturing. The fitply is newer with only 69 ratings but offers a higher R-value of 2.1 and a wider 23.6-inch platform. I’d say the Z Lite is worth the extra cost for its durability and thicker cushion — you’re paying for a pad that will last for years.
Which pad is lighter for backpacking?
The Therm-a-Rest Z Lite is lighter at 14 ounces (0.5 kg) compared to the fitply’s 0.7 pounds. That’s a small difference, but every ounce matters on a long trail. The Z Lite’s accordion fold also makes it easier to strap to the outside of a pack without flopping around. For ultralight backpacking, the Z Lite has the edge.
Can I use the fitply pad as a sit pad or for extra insulation under an inflatable pad?
Absolutely — that’s actually one of its best uses. The fitply’s thin 0.36-inch profile and R-value of 2.1 make it perfect as a sit pad around camp or as a bottom layer under an inflatable mattress for extra warmth. The Z Lite works for this too, but its thicker accordion fold makes it less convenient to stash in a daypack. I keep a fitply folded up in my car for impromptu picnics and campfire seating.
My Final Verdict
After testing both pads side by side, the Therm-a-Rest Z Lite is my clear winner for most backpackers. Its 0.75-inch thickness provides real cushion that the fitply’s 0.36 inches just can’t match, and the proven 4.7-star rating from over 2,200 reviews gives me confidence it’ll last for years. The fitply is a great runner-up if you need better insulation with its R-value of 2.1 or want the wider 23.6-inch platform, but it sacrifices too much comfort on uneven ground.
If you’re stuck deciding, ask yourself one question: do you want thicker padding or better warmth? For the Z Lite, you get the cushion and the track record. For the fitply, you get the insulation and the width. For my money, the Z Lite is the pad I keep reaching for trip after trip.
Winner: Therm-a-Rest Z Lite
- Lightweight and compact closed-cell foam camping mattress is a durable...
- Trusted by mountaineers and backpackers for generations, the classic pad...
- Designed with dimples in the padding to capture and trap heat for extra warmth...
For backpackers who want proven durability, thicker 0.75-inch cushion, and a lightweight 14-ounce pad that straps easily to any pack.
Runner-Up: fitply Ultralight Foam Pad
- 【ULTRA-LIGHT MATERIAL】: This folding sleeping pad is made of ultra-light XPE...
- 【ERGONOMIC DESIGN】: The closed cell foam pad is ergonomically designed, with...
- 【SUPERIOR INSULATION】: The combination of XPE foam and a heat-reflective...
For budget-conscious campers who want a higher R-value of 2.1 and a wider 23.6-inch sleeping surface in a compact package.
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