Katin Flow crew neck sweatshirt. Pullover crew neck sweatshirt from Katin. Vintage-washed fleece sweatshirt with a cozy feel and mineralized finish. Cut in a standard fit with graphics at the front and back. Crafting surfwear and California-inspired apparel since 1954, Katin will have you suited up for any adventure, whether it's on a surfboard, mountaintop or anywhere in between.