Improve the comfort and warmth of your waterproof footwear with new XTRATUF Felt 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. 50% Wool/ Poly Blend 8mm Thick Breathable: Wool insulation is breathable and can keep your warm in the winter and cool in the summer. Lightweight insole. Cut to fit if needed. Moisture and Mold Control: Wool is mildew and mold resistant. It wicks away moisture from the body, creating a drier, more comfortable environment. Regulates Humidity: Wool absorbs moisture when the atmosphere is damp and releases it when the atmosphere is dry. Sustainable: Sheep wool is a 100% natural product that requires less energy to produce than man-made equivalents.