Part of our new ultralight composite bag series, the Ion’s body-mapped combo of synthetic insulation and 850-fill-power water-resistant down fuses warmth with function. Rated down to 20 degrees and designed with a curved baffle construction to reduce shifting down, this bag has loads of features designed to make your night comfy and cozy. Stuff and storage sack included.
Joining forces: We employed all of the insulating technologies for the Ion by utilizing both down and synthetic insulations to develop this ultra lightweight composite bag rated down to 20 degrees.
Body Mapped- 850FP Down wraps around body, head, foot and super efficient Thermal R Micro on bottom