Official Mariners Kids jackets are here at Fanatics.com so you can show your support for your team throughout the year. No matter the weather, an authentic Seattle Mariners jacket will keep you warm and game day ready. Our Kids Seattle Mariners jackets are available in a variety of styles for every fan, including windbreakers, Mariners starter jackets, Seattle Mariners throwback jackets, full-zip jackets, pullover jackets and much more. A new Mariners varsity jacket would make a great addition to your game day wardrobe. Every fan can find a MLB Mariners jacket that fits their style when that shop at Fanatics.