diff --git a/backoff.go b/backoff.go
index d113e68..27898f3 100644
--- a/backoff.go
+++ b/backoff.go
@@ -16,12 +16,26 @@ import (
 // be used concurrently.
 type Backoff struct {
 	attempt uint64
-	// Factor is the multiplying factor for each increment step
+
+	// Factor is the multiplying factor for each increment step.
+	//
+	// Defaults to 2.
 	Factor float64
-	// Jitter eases contention by randomizing backoff steps
+
+	// Jitter eases contention by randomizing backoff steps.
+	//
+	// Defaults to false.
 	Jitter bool
-	// Min and Max are the minimum and maximum values of the counter
-	Min, Max time.Duration
+
+	// Minimum value of the counter.
+	//
+	// Defaults to 100 milliseconds.
+	Min time.Duration
+
+	// Maximum value of the counter.
+	//
+	// Defaults to 10 seconds.
+	Max time.Duration
 }
 
 // Duration returns the duration for the current attempt before incrementing