Therm-a-Rest Z Lite SOL vs NEMO Switchback

Most comparisons on this site exist because two products trade off against each other: one is lighter, the other is cheaper; one is warmer, the other packs smaller. This one is different. Line up the Therm-a-Rest Z Lite SOL and the NEMO Switchback and the two pads land on the same list price, the same published R-value and nearly the same folded footprint. If you're choosing between them, you're not choosing on the numbers most buyers shop by — you're choosing on the handful of details that actually differ.

The closest tie in our catalog

Both pads list at $50–$100 MSRP band — the same MSRP band. Both are rated R 2. Both fold to roughly 20 x 5 x 5.5 in. Our best budget sleeping pads roundup ranks them back to back for exactly this reason: past the price and the warmth gate, the deciding factor between them is a handful of grams and a tenth of an inch of foam.

That makes this a different kind of comparison from most on this site. There's no cottage-brand alternative to talk you out of and no premium pad quietly winning on every spec. The job here is simply to lay out the few real differences plainly, so you don't spend time hunting for a decisive factor that the published specs don't actually support.

Weight, price and R-value, side by side

The Z Lite SOL saves 270 g (9.5 oz) vs the Therm-a-Rest Trail Scout (Regular); the Switchback saves 265 g (9.3 oz) vs the Therm-a-Rest Trail Scout (Regular). Both clear the Therm-a-Rest Trail Scout (Regular) (680 g (1 lb 8.0 oz)) by a wide margin, and their value figures land close together too: Value 7.5/10 for the Z Lite SOL against Value 7.4/10 for the Switchback. The gap between them is 5 g (0.2 oz) — about the weight of a couple of tent stakes, not a number that should drive a purchase on its own.

One honesty note on the Z Lite SOL's weight: Therm-a-Rest's own spec line lists both “14 oz” and “0.41 kg” for the Regular size, and those two figures don't quite agree (14 oz converts to about 397 g, not 410 g). We use the heavier metric figure, which is disclosed on the product's spec table. Either way, the Z Lite SOL is still the lighter of these two pads.

Flat foam vs a hexagonal node pattern

Therm-a-Rest describes the Z Lite SOL as “molded closed-cell crosslinked polyethylene foam with ThermaCapture reflective coating” (Therm-a-Rest). NEMO describes the Switchback as “dual-density closed-cell PE foam” in a “hexagonal nesting node pattern” (NEMO). Beyond that, neither maker's page describes exactly how the surface feels underneath you, and this site doesn't sleep on gear to find out — so we won't guess which texture you'll prefer. What the specs do confirm is the Switchback's extra 0.15 in of thickness (0.9 in against 0.75 in), which is the more concrete of the two texture-related differences.

Both pads fold rather than roll, which is worth flagging if you've shopped foam pads before. Our top-ranked foam pick, the Therm-a-Rest RidgeRest Classic, rolls to a 20 x 8 in cylinder (Therm-a-Rest). The Z Lite SOL and Switchback instead accordion-fold to a flatter, roughly rectangular block. Folded pads tend to strap more securely to a flat pack panel; rolled pads tend to compress smaller under a bungee. Both are legitimate carry methods — it's a difference between the RidgeRest Classic and this pair, not between the Z Lite SOL and the Switchback themselves, which fold the same way.

The reflective coating, and what “R 2” means on each page

Therm-a-Rest credits the Z Lite SOL's ThermaCapture coating as part of what earns its R 2 rating, though the spec table itself doesn't name the ASTM standard. NEMO's Switchback page also lists R 2 without naming the standard on the page, but NEMO's own journal states that “with this standard in place and all of our pads tested to this standard, we are now publishing all of our R-Values” (NEMO), referring to ASTM F3340. Practically, both pads land in the same spot on Klymit's published season chart — the top of the “ideal for summer camping” band, R 1-2 (Klymit) — so neither has a warmth edge worth paying for over the other. If you need more R-value than either pad offers, NEMO's own note that R-value stacks when pads are layered means either foam pad works as a warm-night base under an air pad; our R-value guide covers how that math works.

Durability and warranty

Neither pad has anything to puncture, which is the whole appeal of closed-cell foam over an air pad. Therm-a-Rest backs the Z Lite SOL with a Limited Lifetime Warranty. NEMO backs the Switchback with its Adventure Forever Guarantee, described as “a lifetime warranty against defects in workmanship and materials to the original owner” (NEMO). Both are effectively lifetime coverage against manufacturing defects; neither maker's warranty covers ordinary wear, which for a foam pad mostly means the surface compressing and losing loft over years of use — something neither product page quantifies.

Packed size and where it rides on your pack

Neither of these pads folds small enough to disappear inside a pack the way an air pad does. Both land at roughly 20 x 5 x 5.5 in folded, which means both ride outside on straps, in a mesh side pocket, or lashed under the lid. If your pack has no external attachment points, that's a real strike against either pad, not just one of them — check our budget ultralight backpack rankings for what each pack offers on the outside before you commit to a foam pad at all. The upside of riding outside is that a folded foam pad also works as an instant sit pad at a lunch stop or a wind block for a stove, something neither maker's page claims but that follows directly from being rigid, closed-cell foam rather than an air chamber.

Fitting either pad into a tight budget

At the same list price, neither pad changes the math if you're assembling a full kit under a hard ceiling. Our $500 ultralight backpacking kit uses a foam pad in this price range specifically because it frees up budget for the shelter and sleep system slots, which move the needle on both weight and comfort more than the pad does at this end of the market. If you're choosing between putting the savings from a foam pad toward a warmer quilt or a lighter tent, that trade matters more than which of these two nearly identical pads you pick.

Why the overall score comes out a near-tie

Our rubric weights grams saved per dollar at 35%, absolute weight at 20%, function (mostly R-value here) at 25%, materials and durability at 10%, and ease and versatility at 10% (full breakdown on our methodology page). Feed two pads with the same list price and the same R 2 rating into that formula and the value and function components land identically. The only inputs left to separate them are weight, where the Z Lite SOL has a small edge, and the editorial durability and ease judgments, where the Switchback's extra thickness and NEMO's lifetime warranty wording offset the Z Lite SOL's slight weight advantage almost exactly. A tie on overall score isn't a bug in the math; it's an accurate reflection of two pads that are genuinely this close.

If you're also weighing whether to skip foam entirely and start with the cheapest air pad instead, our Klymit Static V vs NEMO Tensor comparison runs that math against a premium insulated pad.

Who should buy which

• You want the lightest possible foam pad: the Z Lite SOL, by a small but real margin.
• You want the most cushion a foam pad here offers: the NEMO Switchback, for its extra 0.15 in of thickness.
• You already own other gear from one brand: either pad is a reasonable reason to stay in that ecosystem — the specs don't give the other brand a real edge.
• You're deciding between foam and air entirely: back up a step first. Our foam vs inflatable sleeping pads guide covers that larger decision before you pick between these two.

If I had to pick blind, I'd take the Z Lite SOL for the few grams saved and call the rest a wash. If you sleep on your side and want every fraction of an inch of cushion a foam pad can give you, the Switchback's extra thickness is the more defensible reason to prefer it.

What we can't tell you

This site doesn't test gear, and a near-tie like this one is exactly where actual use would normally settle a debate — which texture feels better against a hip, which pad holds its loft longer after a season of folding and unfolding. We don't have that data, and we won't invent it. Every number above comes from the two makers' own product pages, linked in the Sources list below. For the full ranked field these two pads compete in, including the air pads that trade thickness and pack size for a higher price, see best budget sleeping pads, and the scoring rubric behind every number on this page is published in full on our methodology page.

Not every pad matchup on this site is this close. Our Klymit Static V vs NEMO Tensor comparison covers the opposite extreme — a four-times price gap between the cheapest air pad we track and a premium one — and NEMO Tensor vs NeoAir XLite NXT sits somewhere in between. Reading all three side by side is a fast way to see what a dollar actually buys across the sleeping pad shelf, not just within one pair.