Selkie is a fashionable sweatshirt jacket that allows the wearer to wear it in areas that often switch between warm and cold temperatures. This is made possible with easily detachable sleeves that attach to the torso of the jacket itself so they’re always available when you want to put them back on. Selkie allows the wearer to go between areas with varying temperatures without having to wear and keep track of many layers. This can be helpful in buildings with inconsistent heat, or when, because of weather or increased activity, you know you will want to cool off later. Selkie also creates a fashionable look that can change throughout the day. The inner lining of the sleeves is made in complementing or contrasting colors to create a new color blocked look, on top of the changing silhouette. Selkie is a convenient article of clothing that keeps you comfortable and stylish while freeing you from having to change clothes or wear many layers.