diff --git a/aws/awss3/options/s3download/s3_download.go b/aws/awss3/options/s3download/s3_download.go
index 0e923c5..5d0ab83 100644
--- a/aws/awss3/options/s3download/s3_download.go
+++ b/aws/awss3/options/s3download/s3_download.go
@@ -5,6 +5,7 @@ type OptionS3Download interface {
 }
 
 type confS3Download struct {
+	// Sets the function used to replace file names in downloaded files.
 	FileNameReplacer FileNameReplacerFunc
 }
 
@@ -15,6 +16,8 @@ func (o OptionFileNameReplacer) Apply(c *confS3Download) {
 	c.FileNameReplacer = FileNameReplacerFunc(o)
 }
 
+// WithFileNameReplacerFunc
+// Sets the function used to replace file names in downloaded files.
 func WithFileNameReplacerFunc(fileNameReplacerFunc FileNameReplacerFunc) OptionFileNameReplacer {
 	return OptionFileNameReplacer(fileNameReplacerFunc)
 }
diff --git a/aws/awss3/options/s3head/s3_head.go b/aws/awss3/options/s3head/s3_head.go
index b0bf2c1..db833cb 100644
--- a/aws/awss3/options/s3head/s3_head.go
+++ b/aws/awss3/options/s3head/s3_head.go
@@ -31,6 +31,9 @@ func (o OptionTimeout) Apply(c *confS3Head) {
 	c.Timeout = time.Duration(o)
 }
 
+// WithTimeout
+// Timeout can specify the number of seconds to wait when using a waiter
+// to check for the existence of an object.
 func WithTimeout(duration time.Duration) OptionTimeout {
 	return OptionTimeout(duration)
 }
@@ -41,6 +44,10 @@ func (o OptionMinDelay) Apply(c *confS3Head) {
 	c.MinDelay = time.Duration(o)
 }
 
+// WithMinDelay
+// MinDelay is the minimum amount of time to delay between retries. If unset,
+// ObjectExistsWaiter will use default minimum delay of 5 seconds. Note that
+// MinDelay must resolve to a value lesser than or equal to the MaxDelay.
 func WithMinDelay(minDelay time.Duration) OptionMinDelay {
 	return OptionMinDelay(minDelay)
 }
@@ -51,6 +58,10 @@ func (o OptionMaxDelay) Apply(c *confS3Head) {
 	c.MaxDelay = time.Duration(o)
 }
 
+// WithMaxDelay
+// MaxDelay is the maximum amount of time to delay between retries. If unset or set
+// to zero, ObjectExistsWaiter will use default max delay of 120 seconds. Note that
+// MaxDelay must resolve to value greater than or equal to the MinDelay.
 func WithMaxDelay(maxDelay time.Duration) OptionMaxDelay {
 	return OptionMaxDelay(maxDelay)
 }
@@ -61,6 +72,8 @@ func (o OptionLogWaitAttempts) Apply(c *confS3Head) {
 	c.LogWaitAttempts = bool(o)
 }
 
+// WithLogWaitAttempts
+// LogWaitAttempts is used to enable logging for waiter retry attempts
 func WithLogWaitAttempts(logWaitAttempts bool) OptionLogWaitAttempts {
 	return OptionLogWaitAttempts(logWaitAttempts)
 }
diff --git a/aws/awss3/options/s3list/s3_head.go b/aws/awss3/options/s3list/s3_head.go
index 5f7010d..3572538 100644
--- a/aws/awss3/options/s3list/s3_head.go
+++ b/aws/awss3/options/s3list/s3_head.go
@@ -5,7 +5,11 @@ type OptionS3List interface {
 }
 
 type confS3List struct {
+	// https://github.com/aws/aws-sdk-go-v2/blob/v1.30.4/service/s3/api_op_ListObjectsV2.go#L201-L205
 	// Limits the response to keys that begin with the specified prefix.
+	//
+	// Directory buckets - For directory buckets, only prefixes that end in a
+	// delimiter ( / ) are supported.
 	Prefix *string
 }
 
@@ -16,6 +20,12 @@ func (o OptionPrefix) Apply(c *confS3List) {
 	c.Prefix = &v
 }
 
+// WithPrefix
+// https://github.com/aws/aws-sdk-go-v2/blob/v1.30.4/service/s3/api_op_ListObjectsV2.go#L201-L205
+// Limits the response to keys that begin with the specified prefix.
+//
+// Directory buckets - For directory buckets, only prefixes that end in a
+// delimiter ( / ) are supported.
 func WithPrefix(prefix string) OptionPrefix {
 	return OptionPrefix(prefix)
 }
diff --git a/aws/awss3/options/s3presigned/s3_presigned.go b/aws/awss3/options/s3presigned/s3_presigned.go
index 2571ad9..b4985cc 100644
--- a/aws/awss3/options/s3presigned/s3_presigned.go
+++ b/aws/awss3/options/s3presigned/s3_presigned.go
@@ -7,14 +7,22 @@ type OptionS3Presigned interface {
 }
 
 type confS3Presigned struct {
+	// ContentDispositionType is the type of the Content-Disposition header.
 	ContentDispositionType ContentDispositionType
-	PresignExpires         time.Duration
-	PresignFileName        string
+	// PresignExpires is the duration that the presigned URL will be valid for.
+	PresignExpires time.Duration
+	// PresignFileName is the name of the file that will be returned in the Content-Disposition header.
+	PresignFileName string
 }
 type ContentDispositionType int
 
 const (
+	// ContentDispositionTypeAttachment is the Content-Disposition header type for attachment.
+	// default value, indicating it should be downloaded; most browsers presenting a 'Save as' dialog,
+	// prefilled with the value of the filename parameters if present.
 	ContentDispositionTypeAttachment ContentDispositionType = iota
+	// ContentDispositionTypeInline is the Content-Disposition header type for inline.
+	// indicating it can be displayed inside the Web page, or as the Web page.
 	ContentDispositionTypeInline
 )
 
@@ -36,6 +44,9 @@ func (o OptionPresignFileName) Apply(c *confS3Presigned) {
 	c.PresignFileName = string(o)
 }
 
+// WithPresignFileName
+// PresignFileName is the name of the file that will be returned in the Content-Disposition header.
+// If set, the Content-Disposition header must be set to ContentDispositionTypeAttachment.
 func WithPresignFileName(fileName string) OptionPresignFileName {
 	return OptionPresignFileName(fileName)
 }
@@ -46,6 +57,8 @@ func (o OptionPresignExpires) Apply(c *confS3Presigned) {
 	c.PresignExpires = time.Duration(o)
 }
 
+// WithPresignExpires
+// PresignExpires is the duration that the presigned URL will be valid for.
 func WithPresignExpires(presignExpires time.Duration) OptionPresignExpires {
 	return OptionPresignExpires(presignExpires)
 }
@@ -56,6 +69,8 @@ func (o OptionContentDispositionType) Apply(c *confS3Presigned) {
 	c.ContentDispositionType = ContentDispositionType(o)
 }
 
+// WithContentDispositionType
+// ContentDispositionType is the type of the Content-Disposition header.
 func WithContentDispositionType(tp ContentDispositionType) OptionContentDispositionType {
 	return OptionContentDispositionType(tp)
 }