UST Fillmatic Sleeping Mat

The mat uses an open-cell foam core that expands to draw in air automatically when you open the valve. The two-way flip valve allows you to switch between inflation mode, which lets air in, and deflation mode, which locks the valve open to let air escape quickly as you roll it up.

Yes, with an R-value of 6, this mat provides excellent insulation against cold ground temperatures. It is well-suited for three-season use and can handle chilly shoulder-season nights comfortably.

Yes, the Fillmatic is designed with integrated clips that allow you to attach it to another compatible mat. This creates a seamless, larger sleeping surface, which is a great option for couples sharing a tent.

At 5.5 pounds, this mat is on the heavier side for ultralight backpacking. It is best suited for car camping, base camping, or shorter trips where comfort is a higher priority than shaving off every ounce of pack weight.

The mat features a 30D stretch fabric top that feels softer and more forgiving than standard nylon pads. Combined with the four-inch thickness, it offers a supportive, cushioned feel that mimics a traditional mattress more closely than thinner air pads.