The Koski Zip STKFT Grey combines the practicality of a zippered wader with the flexible construction of the Koski line. The fabric features a fluorocarbon-free C0 DWR treatment, offering a cleaner approach to water repellency. The thicker lower section extends up to the thighs to reinforce the area most subject to wear when moving through the water. The two water-resistant front pockets are made from the same fabric as the waders. Accessory loops and straps on the outside and inside of the pockets help keep essential tools within easy reach.