Sweet potato noodles are clear dried noodles made with sweet potato starch. They are most commonly used in Korean mixed noodles and vegetables (Japchae).
To cook, you soak them in warm water for several minutes or boil depending on the recipe. They are similar to cellophane noodles but have a firmer and more resilient texture.
Store in a cool, dry place in an airtight container or zipper-lock bag.