Best Overall
Therm-a-Rest Z Lite Sol
Key details
- Durability
- No leak possible
- Packed Weight
- 14 oz
- Thickness / Width
- 0.75 in, 20 in
- Pack Size / Method
- Accordion fold, strapped outside
The Z Lite Sol pairs a 14 oz closed-cell accordion with an R-2.6 rating, and because there is no air chamber, it needs no pump, valve, or patch kit. Unroll it on any flat ground and the foam is ready immediately. The reflective coating adds noticeable warmth for a foam pad, while the accordion folds into a compact block that straps to the outside of a pack, preserving interior space for other gear. Closed-cell foam holds up through years of rocky campsites and repeated packing, with no air retention to monitor. On the trail, the pad doubles as a sit pad and can be dropped on gravel without the care an inflatable demands. The R-2.6 rating covers three-season ground insulation without adding bulk inside the pack.
This is the zero-maintenance ground layer for ultralight hikers, thru-hikers, and mountaineers who prefer foam over inflatables. The firm 0.75-inch profile is the main boundary: it can pressure hips for side sleepers who need thick cushioning, and the reflective Mylar coating can wear over time. Back and stomach sleepers, or anyone who accepts a firm night in exchange for a no-inflate design, will take that tradeoff without issue.
💡 Side sleepers can soften the firm surface by placing a thin sit pad under the hips.
Pros
- At 14 oz, the accordion folds into a compact block that straps to the outside of a pack and leaves interior space free.
- Closed-cell foam holds up through years of trail use with no air loss and no puncture repair.
- The R-2.6 reflective coating adds noticeable warmth for a foam pad.
Cons
- The reflective Mylar coating can wear or flake after heavy use.
- Firm 0.75-inch foam can pressure hips for side sleepers.
The Z Lite Sol is the no-inflate ground layer for backpackers who accept a firm sleep surface in exchange for zero-maintenance warmth.