Merrell Gore Tex Low Hiking Shoes in Olive/Black, Women’s size 8.5. Condition is pre-owned, light creasing, Great Tread. Gore-Tex Invisible Fit Technology GORE-TEX Invisible Fit is a technology that bonds the waterproof GORE-TEX membrane directly to a shoe's upper material, eliminating wrinkles and providing the same comfortable, true-to-size fit as a non-waterproof shoe. This makes it lighter and more breathable than traditional GORE-TEX footwear, with faster drying times. The direct bond creates a seamless, "invisible" integration that provides durable waterproof, windproof, and breathable protection without the bulk of a separate membrane.