diff --git a/src/subslice.rs b/src/subslice.rs
index 25063e8..4dbb43c 100644
--- a/src/subslice.rs
+++ b/src/subslice.rs
@@ -1,3 +1,4 @@
+use std::fmt::Debug;
 use std::io::{Read, Write};
 
 use crate::{FatFs, SliceLike};
@@ -9,6 +10,15 @@ pub struct SubSliceMut<'a, S: SliceLike> {
     len: usize,
 }
 
+impl<S: SliceLike> Debug for SubSliceMut<'_, S> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("SubSliceMut")
+            .field("offset", &self.offset)
+            .field("len", &self.len)
+            .finish()
+    }
+}
+
 impl<S: SliceLike> SubSliceMut<'_, S> {
     pub fn new(fat_fs: &mut FatFs<S>, offset: u64, len: usize) -> SubSliceMut<'_, S> {
         SubSliceMut {
@@ -70,6 +80,15 @@ pub struct SubSlice<'a, S: SliceLike> {
     len: usize,
 }
 
+impl<S: SliceLike> Debug for SubSlice<'_, S> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("SubSliceMut")
+            .field("offset", &self.offset)
+            .field("len", &self.len)
+            .finish()
+    }
+}
+
 impl<S: SliceLike> SubSlice<'_, S> {
     pub fn new(fat_fs: &mut FatFs<S>, offset: u64, len: usize) -> SubSlice<'_, S> {
         SubSlice {