diff --git a/Assets/VRM10_Samples/ClothSample/ClothWarp/Runtime/Components/ClothWarpRuntimeProvider.cs b/Assets/VRM10_Samples/ClothSample/ClothWarp/Runtime/Components/ClothWarpRuntimeProvider.cs
index c9f2e4a3a..31116a6a6 100644
--- a/Assets/VRM10_Samples/ClothSample/ClothWarp/Runtime/Components/ClothWarpRuntimeProvider.cs
+++ b/Assets/VRM10_Samples/ClothSample/ClothWarp/Runtime/Components/ClothWarpRuntimeProvider.cs
@@ -70,7 +70,7 @@ namespace UniVRM10.ClothWarp.Components
                         var joint = joints[i];
 
                         // mod ?
-                        var stiffness = joint.m_stiffnessForce * 6;
+                        var stiffness = joint.m_stiffnessForce;
 
                         var settings = new UniGLTF.SpringBoneJobs.Blittables.BlittableJointMutable
                         {
diff --git a/Assets/VRM10_Samples/ClothSample/ClothWarp/Runtime/Jobs/Particle.cs b/Assets/VRM10_Samples/ClothSample/ClothWarp/Runtime/Jobs/Particle.cs
index 97da47f3b..1d068f31e 100644
--- a/Assets/VRM10_Samples/ClothSample/ClothWarp/Runtime/Jobs/Particle.cs
+++ b/Assets/VRM10_Samples/ClothSample/ClothWarp/Runtime/Jobs/Particle.cs
@@ -86,7 +86,7 @@ namespace UniVRM10.ClothWarp.Jobs
                 var parentParentRotation = CurrentTransforms[parent.ParentIndex].Rotation;
 
                 var velocity = (CurrentPositions[particleIndex] - PrevPositions[particleIndex]) * (1.0f - particle.Settings.dragForce);
-                var resilience = parentParentRotation * parent.InitLocalRotation * particle.InitLocalPosition *
+                var resilience = parentParentRotation * parent.InitLocalRotation * particle.InitLocalPosition.normalized *
                            particle.Settings.stiffnessForce;
                 var external = particle.Settings.gravityDir * particle.Settings.gravityPower + Frame.Force;