The design of the H chambers reduces cold spots. The sleeping bag has an anatomical cut and a specially developed snug hood shape. The new collar and drawcord design makes it easy to adjust the size of the top circumference of the sleeping bag to suit your needs. The innovative "Alpha foot box" bottom shape increases comfort and convenience when sleeping with a bevelled trapezoid that follows the shape of the freely lowered feet when sleeping on your back. High thermal comfort. The mummy shape perfectly follows the human figure. Closed H-chambers prevent feathers from moving around the sleeping bag. Closed construction allows for washing and easy maintenance. 2D collar separates the head compartment from the body compartment. Self-locking clasps allow one-handed adjustment of the hood circumference. Reversible zipper allows the sleeping bag to be unzipped from the top and bottom. The innovative "Alpha foot box" bottom shape increases comfort and convenience when sleeping on your back. Compression and storage bag included. Left zipper.