This J.Crew Women's Sherpa Lined Puffer Jacket in mountain white features a durable polyamide outer shell with a cozy polyamide lining. The jacket has long sleeves, a short length, and a regular fit in size medium. It is designed with a zip and snap closure, making it suitable for various occasions from travel to workwear. The puffer jacket is insulated with polyester, making it ideal for winter, fall, and spring seasons, while the lightweight construction and inner pockets add practicality and style to the garment.