Easy Key Lime Pie

makes 2 Pies
2 graham cracker pie crust
1 (14 ounce) can sweetened condensed milk
1 (6 ounce) can frozen limeade concentrate
1 (12 ounce) carton Cool Whip
1.Combine Sweetened condensed milk, limeaid and cool whip in a mixing bowl.
2.Stir until thoroughly mixed.
3.Pour into 2 graham cracker crusts.
4.Let chill.
5.Filling will become firmer when chilled.