Dry the lettuce completely and overlap two leaves to make a sturdy base. Layer with tomato, turkey, avocado, cheese, and pickles, then drizzle with mustard.
Roll
Fold the lettuce around the filling and roll snugly. Repeat with the remaining lettuce and filling.
Pack for lunch
Place the wraps in a sturdy lunch container and refrigerate until ready to pack in a lunch bag with an ice pack.