The full-featured Marmot Trestles 30 Deg Reg Sleeping Bag is a reliable, all-purpose synthetic bag that insulates even in sustained cool and damp conditions while backpacking, trekking and mountaineering. Wave Construction offers the advantages of both traditional blanket and shingle construction with no significant increases in bag weight. Additional features of Wave constructed bags include: a Nautilus hood: the same construction as the Marmot 8000m jacket hood, a 3D hood that wraps around your head and reduces heat loss, SpiraFil insulation: a unique blend of 3 denier conjugated spiral hollow fibers for loft and 1 denier polyester fibers for warmth, softness and compressability, Zipper guard: keeps the draft tube fabric from getting caught in the zipper, and a Trapezoid foot box: matches the shape of your feet, wider in the toe area and narrower in the heels.
SPIRAFIL™ is a unique blend of 3 denier spiral hollow fibers for loft and 1 denier polyester fibers for warmth, softness and compressibility. Thermally bonded for high tear strength and long-term durability. Exceptional combination of softness, lightweight, and compactability.