PREHEAT oven to 350° F. Lightly grease 13 x 9-inch baking pan.
COMBINE oats, flour, brown sugar, baking soda and salt in large bowl. Add melted butter; stir until well combined. Press half of mixture onto bottom of prepared pan. Bake for 10 minutes.
COMBINE caramels and whipping cream in medium saucepan. Cook over medium-low heat, stirring occasionally, until caramels are melted and mixture is smooth. Sprinkle morsels over baked crust. Drizzle caramel mixture evenly over the chocolate morsels. Sprinkle remaining crumb mixture over caramel layer.
BAKE 18 to 20 minutes or until top is light brown. Cool in pan on wire rack. Cut into bars.