Comfort Plus SI Mattress – Large
- 2 in stock
- Backordered, shipping soon

The measurements presented are for guidance only.
How to choose the right size
User Height: Measure your full height, barefoot, in an upright position.
Usage: Choose the snuggest possible size to optimize comfort, insulation, and weight.
Sleeping Bag Sizes
| Size | Recommended User Height | Internal Bag Length |
|---|---|---|
| Short | Up to 170 cm | 185 cm |
| Regular | Up to 183 cm | 198 cm |
| Long | Up to 198 cm | 213 cm |
Sleeping Mat Dimensions
| Size | Length | Width |
|---|---|---|
| Short | 168 cm | 55 cm |
| Regular | 183 cm | 55 cm |
| Large | 198 cm | 64 cm |
| Rectangular Regular | 183 cm | 64 cm |
| Rectangular Large | 198 cm | 64 cm |
Sleeping Pads
| Size | Length (cm) | Width (cm) |
|---|---|---|
| Short | 168 | 55 |
| Regular | 183 | 55 |
| Large | 198 | 64 |
| Rectangular Regular | 183 | 64 |
| Rectangular Large | 198 | 64 |
Sleeping Pad Thicknesses
| Range | Thickness (cm) | Comfort | Recommended Use |
|---|---|---|---|
| Ultralight | 5 | Minimal | Ultralight, fastpacking, fast hiking |
| Camp / Lightweight | 5 – 7.5 | Good | Hiking, trekking |
| Ether Light | 10 | Very High | Camping, comfortable trek, side sleepers |
| Comfort Plus | 6.3 (double layer) | High + Safety | Camping, expeditions, air redundancy |
| Comfort Deluxe | 10 | Maximum | Camping, van life, comfort prioritized |
| Self-Inflating | 3.8 – 7.5 | Variable | Camping, versatile use |
All prices are displayed including taxes.
The amount shown is the final price you pay at checkout (shipping fees may apply).
Free shipping on all orders of $200 or more, in Canada and the United States.
Orders ship within 48 hours.
Enjoy 14-day returns after delivery.
Items must be new, unworn, and with original tags attached.
All prices are displayed including taxes.
The amount shown is the final price you pay at checkout (shipping fees may apply).
Free shipping on all orders of $200 or more, in Canada and the United States.
Orders ship within 48 hours.
Enjoy 14-day returns after delivery.
Items must be new, unworn, and with original tags attached.
All prices are displayed including taxes.
The amount shown is the final price you pay at checkout (shipping fees may apply).
Free shipping on all orders of $200 or more, in Canada and the United States.
Orders ship within 48 hours.
Enjoy 14-day returns after delivery.
Items must be new, unworn, and with original tags attached.
Why this price?
- Samples and overstock from major brands
- New products
- Limited quantities – no restock
The Sea to Summit Air Sprung Cell Double-Layer sleeping mat offers optimal comfort for your adventures in all seasons. Its double-layer construction ensures stable and durable support, even in the event of a partial puncture. The multi-function valve allows for quick inflation, easy deflation, and precise firmness adjustment.
Main features
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2.5-inch double-layer mattress for enhanced comfort and support
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R-Value 4 for effective insulation in 4-season camping
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Air Sprung Cell construction for stable and durable support
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Reduced heat loss thanks to high-loft insulation and reflective fabric
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Durable and quiet 30D/40D surface fabric
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Regular size: 72 x 21.5 x 2.5 inches
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Includes storage bag, repair kit, and PillowLock patches to secure a pillow
Materials
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Face: 30D/40D Nylon
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Filling: High-loft fiber and integrated insulation
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Structure: Double-layer Air Sprung Cell
Strengths
✔️ Lasting comfort and optimal support thanks to the double layer
✔️ Effective insulation with R-Value 4 for all seasons
✔️ Quick inflation and easy deflation thanks to the multi-function valve
✔️ Durable and quiet surface for a comfortable sleep
✔️ Compatible with PillowLock to secure the pillow