Unfortunately, there is a tradeoff to ice fishing boots that sport a ton of insulation and that tradeoff is the weight. As you may have expected, yes, the grade of insulation is going to have a direct impact on the weight. Here is why it should not be a concern to you, however. In most cases, you would want to buy footwear that is light in weight to ensure optimal breathability. Well, when the temperature drops below freezing, your main priority should be the warmth. Also, with ice fishing, you are typically stable in one spot for several hours.