Some lightweight insulated rain and winter jackets sacrifice insulating warmth to shed ounces, but Columbia's Kaleidaslope II Shell Jacket for women delivers big on less heft and extra thermal warmth. The Women's Kaleidaslope II Shell Jacket utilizes a combination of traditional polyester insulation with a groundbreaking Omni-Heat(R) thermal reflective liner. The liner features an array of Omni-Heat(R) thermal dots that reflect thermal warmth back to your arms and torso. These thermal dots reflect heat much like the reflective blankets applied to distance runners after long races, but the spaces between the dots allow for moisture to escape to the exterior of the Kaleidaslope II Shell Jacket. This insulating outerwear is also compatible with other Columbia three-point Interchange shells and jackets, so you can attach the Kaleidaslope II to a waterproof skiing or climbing shell for enhanced weather protection.