Side sleepers welcome the Big Agnes inflatable sleeping pad. Unlike non-inflating sleeping pads, your hips won't dig into the ground causing you to toss-and-turn throughout the night. The Air Core inflates with two and a half inches of wiggle room between you and the ground. The mummy style fits in well to tapered tents and bivys. The Air Core's I-beam construction eliminates welded seams reducing cold spots and increasing comfort.