As an expert in outdoor gear and materials, I can provide you with a comprehensive understanding of Gore-Tex boots and their waterproof capabilities.

Gore-Tex is a brand of waterproof and breathable fabric that is widely used in various types of outdoor footwear, including hiking boots. The technology behind Gore-Tex is quite remarkable. It utilizes a microporous membrane that is designed to prevent liquid water from passing through while allowing water vapor to escape. This means that while the boots are supposed to keep your feet dry in wet conditions, they also allow sweat to evaporate, thus providing a comfortable and dry environment for your feet.

However, it's important to note that no waterproof material is completely impervious to water under all conditions. Gore-Tex is highly effective, but there are factors that can affect its performance. For instance, if the boots are submerged for extended periods or exposed to heavy and continuous rainfall, the waterproofing may be compromised. Additionally, the quality of the construction and the overall design of the boots can also play a role in how well they keep water out.

The Vasque Sundowner Classics you mentioned are a popular choice among hikers due to their reputation for durability and comfort. They incorporate a Gore-Tex liner, which should theoretically provide a high level of waterproof protection. However, individual experiences may vary. Some users have reported that their Vasque boots have kept their feet dry in various conditions, while others have experienced some water leakage, especially after prolonged exposure to water.

It's also worth noting that the maintenance of Gore-Tex boots is crucial for maintaining their waterproof properties. Over time, dirt, sweat, and other substances can clog the micropores of the Gore-Tex membrane, reducing its effectiveness. Regular cleaning and the use of a waterproofing treatment specifically designed for Gore-Tex products can help to restore and maintain the waterproofing.

In conclusion, while Gore-Tex boots are designed to be waterproof, their effectiveness can be influenced by several factors, including the conditions they are exposed to, the quality of the boots' construction, and how well they are maintained. For the best results, it's recommended to follow the manufacturer's care instructions and to use the boots within the limits of their design.

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Gore-Tex hiking boots are supposed to be waterproof, right? Well, they are--except when they're not. My standard hiking footwear is a pair of Vasque Sundowner Classics, which include a Gore-Tex liner. ... First of all, Gore-Tex is a completely waterproof barrier that blocks liquid water from passing through.Apr 1, 2013read more >>