The Women's WHIRLIBIRD IV Interchange Jacket by Columbia has all the mountain-ready features for you to enjoy longer days skiing or snowboarding the slopes. The synthetic insulation stays warm even when wet. Heat is reflected back to the inside by the lining. you can use the insulated inner jacket on its own or zipped into the shell. The shell is fully waterproof and breathes to let loose excess moisture. Underarm vents regulate temperatures inside.