Therm-a-Rest Z Lite Original Sleeping Pad
- Variety: Closed Cell Foam Pad
- Material Type: Closed-Cell Foam
- Water Resistance Level: Water Resistant
- Warranty Description: Limited lifetime
Last refreshed Sep 10, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A dependable, failure-resistant foam pad for backpackers who would rather sleep a little firmer than risk a flat inflatable pad miles from the trailhead.
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ASIN: B00453NA1ECategory: Foam Sleeping Mats
Overview
The Therm-a-Rest Z Lite Original is a closed-cell foam sleeping pad that folds accordion-style into a compact bundle, giving backpackers a durable option for sleeping on the ground without an inflatable pad's setup or failure risk.
Closed-cell foam has no air chamber to puncture or leak, which is the main tradeoff this pad makes against inflatable pads: less cushioning per ounce, but nothing that can go flat on a trip. The dimpled surface pattern is there to trap warmth, and Therm-a-Rest states an R-value of 1.7, which is cool-weather-capable but not a winter-grade insulation rating. The foam is also built asymmetrically, softer facing up for comfort and denser facing down for durability against rocks and rough ground.
- 72 x 20 in unfolded, 14 oz
- Folds to 20 x 5 x 5.5 in
- R-value of 1.7 for insulation
- Accordion-style closed-cell foam construction
Who it's for
Backpackers who want a sleeping pad that cannot puncture or lose air overnight, and who prioritize reliability and packed weight over maximum cushioning, fit this pad well. Side sleepers or anyone wanting a plush feel should look at an inflatable or self-inflating pad instead.
Pros and cons
- Cannot puncture or lose air overnight
- Folds to a compact, strap-on size
- Denser underside resists wear from rough ground
- Made in the USA
- Firmer than an inflatable or self-inflating pad
- R-value of 1.7 is modest for cold-weather use
- Bulkier per R-value than an inflatable pad
Performance notes
The accordion fold is what makes a foam pad backpacking-viable at all, compressing a 72 x 20 inch pad down to a 20 x 5 x 5.5 inch bundle that straps to the outside of a pack. The dimpled foam surface increases surface area and traps air pockets against the body, which is how a simple foam pad reaches an R-value of 1.7 instead of a flatter, lower number. Because the insulation and cushioning come entirely from the foam itself, there is no air chamber to lose pressure overnight the way an inflatable pad can.
Specifications
| Brand | Therm-a-Rest |
|---|---|
| Dimensions & fit | |
| Item Dimensions L x W x Thickness | 72 × 20 × 0.7 inches |
| Construction & materials | |
| Material Type | Closed-Cell Foam |
| Color | Coyote/Grey |
| Included components | |
| Unit Count | 1 |
| Number of Packs | 1 |
| Included Components | Camping Pad |
| Warranty & support | |
| Warranty Description | Limited lifetime |
| Other details | |
| Variety | Closed Cell Foam Pad |
| Water Resistance Level | Water Resistant |
| Number of Items | 1 |
| Item Type Name | Camping And Backpacking Sleeping Pad |
| Item Highlight | Ultralight, durable trail comfort with Z Lite Sleeping Pad |
Frequently asked questions
What is the R-value of the Therm-a-Rest Z Lite Original?
Therm-a-Rest rates it at 1.7.
How big does the Z Lite Original pack down?
It folds accordion-style to about 20 x 5 x 5.5 inches and weighs 14 ounces.
Can the Z Lite Original puncture like an inflatable pad?
No, it is closed-cell foam with no air chamber, so it cannot puncture or lose air overnight.