diff --git a/sample/Ardalis.Sample.Domain/Specs/AdultCustomersByNameSpec.cs b/sample/Ardalis.Sample.Domain/Specs/AdultCustomersByNameSpec.cs
index c2228a01..a35fd12c 100644
--- a/sample/Ardalis.Sample.Domain/Specs/AdultCustomersByNameSpec.cs
+++ b/sample/Ardalis.Sample.Domain/Specs/AdultCustomersByNameSpec.cs
@@ -6,7 +6,7 @@ public class AdultCustomersByNameSpec : Specification<Customer>
 {
     public AdultCustomersByNameSpec(string nameSubstring)
     {
-        Query.Where(c => CustomerPredicates.IsAdult(c) &&
-             CustomerPredicates.NameIncludes(c, nameSubstring));
+        Query.IsAdult()
+            .NameIncludes(nameSubstring);
     }
 }
diff --git a/sample/Ardalis.Sample.Domain/Specs/CustomerSpecExtensions.cs b/sample/Ardalis.Sample.Domain/Specs/CustomerSpecExtensions.cs
index 54540ee5..ac044241 100644
--- a/sample/Ardalis.Sample.Domain/Specs/CustomerSpecExtensions.cs
+++ b/sample/Ardalis.Sample.Domain/Specs/CustomerSpecExtensions.cs
@@ -3,7 +3,7 @@
 
 namespace Ardalis.Sample.Domain.Specs;
 
-// Examples how to add extend specifications.
+// Examples how to extend specifications.
 // These extensions are applied in Ardalis.Sample.Domain.Specs.CustomerSpec
 public static class CustomerSpecExtensions
 {
@@ -33,4 +33,13 @@ public static ISpecificationBuilder<Customer> TagWith(this ISpecificationBuilder
         builder.Specification.Items.TryAdd("TagWith", tag);
         return builder;
     }
+
+    // Some more extension examples.
+    // These extensions are applied in Ardalis.Sample.Domain.Specs.AdultCustomersByNameSpec
+    public static ISpecificationBuilder<Customer> IsAdult(this ISpecificationBuilder<Customer> builder)
+        => builder.Where(x => x.Age >= 18);
+    public static ISpecificationBuilder<Customer> IsAtLeastYearsOld(this ISpecificationBuilder<Customer> builder, int years)
+        => builder.Where(x => x.Age >= years);
+    public static ISpecificationBuilder<Customer> NameIncludes(this ISpecificationBuilder<Customer> builder, string name)
+        => builder.Where(x => x.Name.Contains(name));
 }