Cook noodles according to package instructions. Generally, place rice noodle in a large bowl. Boil enough water to submerge noodles. Pour boiling water over noodles and let sit until noodles are tender. Drain noodles well, run under cold water to stop cooking, and drain again. Let noodles sit while you prepare remaining ingredients.
Fill a large bowl with warm water. Working with one wrapper at a time, dip wrapper into the warm water for 2 seconds to soften. Do not soak the wrapper for too long because it will be very difficult to work with. Don't worry if the wrapper feels too firm. The wrapper will continue to soften as you fill it with ingredients.
Place wrapper on a flat working surface, a plate or cutting board. Fill the wrapper. Begin by placing the lettuce at the bottom of the wrapper, closest to you. Over the lettuce, place the carrots and cucumber slices. Follow with the tofu and herbs. Take a small handful of the cooked noodles and place it over the rest of the ingredients.
To roll, take the end closest to you. Gently pull the wrapper away from the plate/cutting board and fold it over the filling, similar to how you would roll a tortilla burrito. Fold the sides inward, and tightly roll the wrapper.
Repeat with remaining wrappers.