4-Season Insulated Pads · 2026 Comparison
Therm-a-Rest NeoAir XTherm vs NEMO Tensor All-Season
Side-by-side published specs and one research-based review plus the other side's specs. No fabricated verdicts.
Quick Answer
For most 4-season insulated pads shoppers, the NEMO Tensor All-Season is the simpler pick — on published specs it's both 39 g lighter and $30 cheaper than the Therm-a-Rest NeoAir XTherm. The other side wins only on non-spec factors like fit, availability, or brand preference.
The Specs Side by Side
Sleep SystemTherm-a-Rest
Therm-a-Rest NeoAir XTherm
- Price (MSRP)
- $230
- Weight
- 0.44 kg (439 g)
- Ultralight
- Yes
- R-value
- 7.3
- Our rating
- 9.3/10
Our verdict
The Therm-a-Rest NeoAir XTherm NXT is the gold standard for four-season ultralight sleeping pads. With an R-value of 7.3 and a weight of just 15.5 ounces, it delivers exceptional warmth-to-weight performance that no competitor currently matches.
Sleep SystemNEMO
NEMO Tensor All-Season
- Price (MSRP)
- $200
- Weight
- 0.40 kg (400 g)
- Ultralight
- Yes
- Our rating
- specs only — no full review yet
Manufacturer description
R-5.4 insulated air pad, ~0.40 kg (min, regular), 8 cm thick, dual Thermal Mirror film.
What the Numbers Say
- ▸Weight: NEMO Tensor All-Season is the lighter of the two by 39 g (0.40 kg vs 0.44 kg). For thru-hiking and any pursuit where carry weight compounds across days, that delta matters.
- ▸Price: NEMO Tensor All-Season is cheaper at MSRP by $30 ($200 vs $230). Real-world street prices vary, but the starting MSRP gap is consistent.
- ▸Ultralight classification: both products are classified ultralight in their category — built for weight-conscious backpackers from the start.
- ▸Review coverage: only the Therm-a-Rest NeoAir XTherm has a full research-based review (rated 9.3/10). The NEMO Tensor All-Season figures here are manufacturer-published specs only.
Detailed Breakdown
Carry weight and packed size
On the published spec sheet, the NEMO Tensor All-Season comes in at 400 grams against the 439 grams of the Therm-a-Rest NeoAir XTherm. That 39-gram gap may sound trivial in isolation but compounds across multi-day trips — at 25 km a day for a week, you're carrying that delta for about 175 km of trail. The NEMO Tensor All-Season's ultralight classification reflects the deliberate design choices that produce the saving: thinner fabrics, simpler architectures, or fewer secondary features.
Price and total cost of ownership
MSRP gap: $30 (NEMO Tensor All-Season cheaper). For most buyers that's the only price number that matters short-term. Long-term cost depends on durability and warranty handling: a product that lasts seven seasons at $230 costs less per use than a product that lasts three at $200. Without long-term field data on both we won't claim a winner on durability, but it's the lens to apply if you re-sell or replace gear infrequently. Look for current sales on either before assuming MSRP is what you'll pay.
Materials and durability
Material composition for both products comes from the manufacturer product pages and is not always reported in directly comparable units. The Therm-a-Rest NeoAir XTherm has a full research-based review (rated 9.3/10); the NEMO Tensor All-Season carries the manufacturer's published spec only. For the reviewed product, the durability verdict in the linked review draws on published testing and owner feedback. For the spec-only product, treat material claims as starting points, not verified data.
Features and ergonomics
Manufacturer feature descriptions: the Therm-a-Rest NeoAir XTherm (no manufacturer description filed). The NEMO Tensor All-Season — R-5.4 insulated air pad, ~0.40 kg (min, regular), 8 cm thick, dual Thermal Mirror film. Pay particular attention to fit, adjustability, and hand-feel — three dimensions that don't show on a spec sheet and that disproportionately determine whether you'll actually reach for the gear after the first trip.
Use-case fit
The 4-season insulated pads category covers a wide range of trip styles. For weight-counted thru-hikes, lean toward whichever is lighter on this page — every gram in your pack rides with you for thousands of kilometers. For weekend trips and base-camp days, weight matters less and durability, comfort, and feature count matter more — the heavier of the two on this page often makes more sense in those scenarios. For three-season generalist use, our recommendation: prioritize the product you can read a full research-based verdict on — that's the Therm-a-Rest NeoAir XTherm here.
Brand support and availability
Therm-a-Rest and NEMO both produce 4-season insulated pads for the North American and EU markets. Availability varies: smaller cottage brands may require direct-from-manufacturer ordering with 2-6 week lead times, while bigger brands stock through REI, Backcountry, and large EU outdoor chains with same-week shipping. Before buying either, check the manufacturer's warranty terms (often 1, 2, or 10 years depending on brand culture) and the brand's reputation for honoring claims on minor failures versus catastrophic ones. Our research-based review notes warranty interactions where relevant, based on owner reports.
Frequently Asked Questions
Which is lighter, the Therm-a-Rest NeoAir XTherm or the NEMO Tensor All-Season?
On published manufacturer specs, the NEMO Tensor All-Season is the lighter of the two by 39 grams (0.40 kg vs 0.44 kg). For ultralight backpackers counting grams in the 4-season insulated pads category, that's a meaningful difference.
Which costs less, the Therm-a-Rest NeoAir XTherm or the NEMO Tensor All-Season?
At MSRP, the NEMO Tensor All-Season costs $30 less than the Therm-a-Rest NeoAir XTherm ($200 vs $230). Real-world prices fluctuate with sales and seasonal promotions, but the spec-sheet starting price is clear.
Does this site have full reviews of both products?
The Therm-a-Rest NeoAir XTherm has a full research-based review (rated 9.3/10), drawing on published testing and owner feedback. The NEMO Tensor All-Season figures on this page are published manufacturer specs only.
Is the Therm-a-Rest NeoAir XTherm ultralight by industry standards?
Yes. The Therm-a-Rest NeoAir XTherm is classified ultralight in our database (0.44 kg, sub-threshold for its sleep system category). Ultralight 4-season insulated pads typically means built for thru-hikers and gram counters rather than three-season car-camping use.
Is the NEMO Tensor All-Season ultralight by industry standards?
Yes. The NEMO Tensor All-Season is classified ultralight in our database (0.40 kg, sub-threshold for its sleep system category). Built for thru-hikers and weight-conscious backpackers.
Is the price difference worth it?
The Therm-a-Rest NeoAir XTherm costs $30 more without a corresponding weight or spec advantage on paper. Unless it has a hidden benefit (better fit, longer warranty, brand reputation), the NEMO Tensor All-Season is the better value spec-sheet pick.
Where can I read the full review?
Only the Therm-a-Rest NeoAir XTherm has a full review at https://peakgearguide.com/reviews/thermarest-neoair-xtherm. The NEMO Tensor All-Season does not have a full review yet — we list its manufacturer specifications only.
Bottom Line
Winner on weight: the NEMO Tensor All-Season by 39 g (0.40 kg vs 0.44 kg). If your trip style punishes grams, that's the pick.
Winner on price: the NEMO Tensor All-Season at $200 versus $230 for the Therm-a-Rest NeoAir XTherm — a $30 gap that may close or widen with current sales.
Our overall lean: the Therm-a-Rest NeoAir XTherm is the safer pick because it has a full research-based review (9.3/10) where published testing and owner feedback corroborate the spec claims. The NEMO Tensor All-Season may well be excellent, but we can't say so from spec data alone.
Related Guides & Reviews
Buying guide
Browse our 4-season insulated pads guide
Ranked picks for the whole category — reviewed products only.
Full review
Therm-a-Rest NeoAir XTherm — full review
Research-based verdict from published testing and owner feedback. Rated 9.3/10.
All comparisons
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