Lightweight Warmth for Cool‑Weather Adventures.
Meet the ATEPA GridX 5.5 — the versatile, high‑R‑value sleeping pad built for backpackers and campers who push into shoulder seasons and mild winter conditions. Weighing just 1.5 lbs and packing to the size of a standard water bottle (10.24″ x 5.5″), it’s the perfect balance of warmth, comfort, and packability for three‑season trips and chilly winter nights.
Engineered for Comfort in the Cold:
🔥 R‑Value 5.5 – Ready for Cool to Cold Conditions
Rated for temperatures from 0°C down to ‑20°C (32°F to ‑4°F), this pad provides reliable insulation for spring, fall, and mild winter camping. Its 7‑layer HeatLock construction — alternating aluminum foil, TPU, and durable fabric — separates each air chamber to minimize heat loss, so you stay warm without carrying extra weight.
⚖️ Ultralight Design, Real Warmth
At 1.5 lbs, the GridX 5.5 is one of the lightest insulated pads in its class. It fits easily in your pack and sets up fast, so you spend less time managing gear and more time enjoying the outdoors.
🛏️ Vertical Tube Support + Dot‑Grid Surface
Vertical air tubes work with the dot‑grid texture to increase stability and support, reduce ground contact, and prevent slipping — so you sleep soundly on uneven terrain.
🧩 Durable & All‑Terrain Ready
Made from tough, PVC‑free 20D nylon TPU, this pad stands up to rough ground, rocks, and sticks. The 3.94″ thickness cushions you comfortably, whether you're in the backcountry, at a campground, or using it as a guest bed at home.
Specs at a Glance:
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R‑Value: 5.5 (3‑season to mild winter rated)
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Weight: 1.5 lbs (includes stuff sack)
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Packed Size: 10.24″ x 5.5″
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Unfolded Size: 76.4″ L × 24.4″ W × 3.94″ H
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Materials: 20D Nylon TPU, single‑layer aluminum foil insulation
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Includes: Mat, repair kit, 2‑in‑1 inflatable stuff sack, elastic strap
What Campers Are Saying:
“I’ve used the GridX 5.5 on everything from fall backpacking in the Appalachians to winter car camping. At 1.5 lbs, it’s light enough for long miles, and the R‑5.5 keeps me cozy down to about 15°F. The vertical tubes make a noticeable difference in stability!” — Maya, Verified Buyer
Ready to Upgrade Your Sleep System?
Click Add to Cart and get the lightweight, winter‑ready comfort you deserve — without sacrificing pack space or performance.
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ATEPA GridX Series Sleeping Pads
Find the perfect sleeping pad for your adventure
GridX 8
$129.99
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GridX 7.2
$119.99
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GridX 5.5
$109.99
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| R-Value | 8 | 7.2 | 5.5 |
| Weight | 1.68 lbs / 760g | 1.57 lbs / 710g | 1.5 lbs / 680g |
| Dimensions | 76.4" L × 24.4" W × 3.94" H | 76.4" L × 24.4" W × 3.94" H | 76.4" L × 24.4" W × 3.94" H |
| Pad Thickness | 3.94 in | 3.94 in | 3.94 in |
| Packed Size | 10.24" x Φ5.5" | 10.24" x Φ5.5" | 10.24" x Φ5.5" |
| Key Features | High R-Value: 13‑Layer HeatLock Construction – Advanced layers of aluminum foil & insulation separate each air chamber to trap warmth and slash weight, keeping you hot when it’s not. | High R-Value: 9‑Layer HeatLock Construction – Advanced layers of aluminum foil & insulation separate each air chamber to trap warmth and slash weight, keeping you hot when it’s not. | High R-Value: 7‑Layer HeatLock Construction – Advanced layers of aluminum foil & insulation separate each air chamber to trap warmth and slash weight, keeping you hot when it’s not. |
| Capacity | 1 Person | 1 Person | 1 Person |
| Shell Material | TPU material: Free of PVC, BPA and phthalates | TPU material: Free of PVC, BPA and phthalates | TPU material: Free of PVC, BPA and phthalates |
| Valve | 2-in-1 Valve*1 | 2-in-1 Valve*1 | 2-in-1 Valve*1 |
| Material | 20D Nylon TPU | 20D Nylon TPU | 20D Nylon TPU |
| Internal Structure | Engineered for Extreme Cold: 13 precision layers—alternating aluminum foil, TPU coating, and fabric—create independent air cells that minimize heat loss while maximizing warmth-to-weight efficiency. | Engineered for Extreme Cold: 9 precision layers—alternating aluminum foil, TPU coating, and fabric—create independent air cells that minimize heat loss while maximizing warmth-to-weight efficiency. | Engineered for Extreme Cold: 7 precision layers—alternating aluminum foil, TPU coating, and fabric—create independent air cells that minimize heat loss while maximizing warmth-to-weight efficiency. |
| Baffles | YES | YES | YES |
| Sidewalls | NO | NO | NO |
| Outer Bag | 2-in-1 Stuff Sack & Pump Sack | 2-in-1 Stuff Sack & Pump Sack | 2-in-1 Stuff Sack & Pump Sack |
