This sport coat is unlike any sport coat you have ever worn. When you put this jacket on, the weight of it is so light to the point where it does not feel like you are wearing a jacket at all. The Flash is a blend of nylon and elastane, making this garment very durable. Nylon is a very resilient fabric, as it does not damage easily, and is also quick drying, while not absorbing water. To make a long story short, this jacket is the ultimate travel jacket, and once you experience it, no other jacket will be able to compete.