Highly-efficient, hexagonal nesting pattern allocates more space for taller, wider nodes, providing significantly greater plushness. More precise tooling eliminates wasted space between folded layers, enabling taller nodes to nest tighter for a smaller packed size. Taller nodes create more space for uncompressed sleeping bag insulation, trapping more warmth around your body. Premium dual-density Axiotomic foam offers a supple layer for comfort and a resilient layer for support. Metallized thermal reflective film reflects heat back to your body and is protected by a durable film.