Sea to Summit Camp Plus SI Mat

An R-value of 4.3 indicates this mat is well-suited for three-season use, providing enough insulation to keep you warm during spring, summer, and autumn camping. It effectively blocks the cold ground from sapping your body heat, making it a reliable choice for cooler nights.

The mat contains an open-cell foam core that expands and draws air in automatically when you open the valve. You simply unroll it, open the valve, and let it sit for a few minutes; you may need to add a few breaths of air at the end to reach your preferred firmness.

Yes, the 3-inch thickness provides a substantial buffer between you and the ground, which is generally sufficient to prevent side sleepers from bottoming out. The foam core offers a supportive, stable surface that feels more like a traditional mattress than an air-only pad.

The PillowLock system consists of hook-and-loop patches included with the mat that adhere to your Sea to Summit pillow. This creates a secure connection that prevents your pillow from sliding off the mat during the night, keeping it exactly where you need it.

It features a 75D polyester shell, which is a robust, abrasion-resistant fabric designed to withstand the wear and tear of standard camping environments. While it is durable, you should still avoid placing it directly on sharp rocks or thorns to prevent punctures.

When packed, the mat measures approximately 10.2 inches in length and 8 inches in diameter. While it is not as small as ultralight backpacking pads, it strikes a practical balance between comfort and packability for car camping or short-distance hiking.