Because it's PrimaLoft, it's washable and just as warm as down. [Model Number: 3575-4141-DW37] The JAPAN EDITION collection was developed by a Japanese design team to suit the Japanese climate and trends. Designed based on the PrimaLoft vest that our company released ahead of its time in the 90s. The outer fabric is ultra-fine ripstop nylon, and the inner padding has been updated to the highest-grade, ultra-lightweight PrimaLoft Luxe, achieving a high-loft look and advanced heat retention. 【L.L.Bean】 An established American outdoor brand founded in 1912. Even now, celebrating its 100th anniversary, it continues to be supported by a wide range of fans across generations.