Improve the comfort and warmth of your waterproof footwear with Servus 3/8" Felt Men's Insoles. Thick cushioning offers comfort during long days on the job, and insulates your feet from the cold ground. Improved ventilation keeps your feet feeling clean and dry longer. For customized support, these felt insoles will actually conform to the shape of your foot over time. They can also be trimmed to fit into narrower boots. Designed for everyday use, these insoles can be removed and washed as needed.