diff --git a/examples/openclaw-sandbox/README.md b/examples/openclaw-sandbox/README.md
index 2284d226e..1916a6474 100644
--- a/examples/openclaw-sandbox/README.md
+++ b/examples/openclaw-sandbox/README.md
@@ -5,6 +5,7 @@ This example demonstrates how to run [OpenClaw (formerly Moltbot)](https://githu
 ## Prerequisites
 
 -   A Kubernetes cluster (e.g., Kind).
+-   Create nodes with gVisor or Kata Containers runtime class enabled in the cluster. This example is verified using gVisor, see the [gVisor documentation](https://gvisor.dev/docs/user_guide/quick_start/kubernetes/).
 -   `agent-sandbox` controller installed.
 
 ## Usage
diff --git a/examples/openclaw-sandbox/openclaw-sandbox.yaml b/examples/openclaw-sandbox/openclaw-sandbox.yaml
index b16979787..3c828f06e 100644
--- a/examples/openclaw-sandbox/openclaw-sandbox.yaml
+++ b/examples/openclaw-sandbox/openclaw-sandbox.yaml
@@ -8,6 +8,8 @@ spec:
       labels:
         sandbox: openclaw-sandbox
     spec:
+      # This example is verified with gVisor; switch to a different runtime class here
+      runtimeClassName: gvisor
       automountServiceAccountToken: false
       securityContext:
         runAsUser: 1000