diff --git a/src/internal/trace/event.go b/src/internal/trace/event.go
index f31412e35d8..f9c40010c4b 100644
--- a/src/internal/trace/event.go
+++ b/src/internal/trace/event.go
@@ -690,9 +690,11 @@ type Sync struct {
 	// N indicates that this is the Nth sync event in the trace.
 	N int
 
-	// ClockSnapshot is a snapshot of different clocks taken in close in time
-	// that can be used to correlate trace events with data captured by other
-	// tools. May be nil for older trace versions.
+	// ClockSnapshot represents a near-simultaneous clock reading of several
+	// different system clocks. The snapshot can be used as a reference to
+	// convert timestamps to different clocks, which is helpful for correlating
+	// timestamps with data captured by other tools. The value is nil for traces
+	// before go1.25.
 	ClockSnapshot *ClockSnapshot
 
 	// ExperimentalBatches contain all the unparsed batches of data for a given experiment.