diff --git a/README.md b/README.md
index 2f32c46f2b5a669669b08efc6e6a4d84fbcad2a6..e4486d8b8308677ad726201e119bc40d7715b878 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,9 @@
+# XTFS
+
 # Overlay
-Overlay File System
+
 
-Overlay is an easy way to implement a file system in such a way that
+Overlay File System
 production assets can be overridden by assets on disk.
 
 ## Usage
@@ -12,14 +14,14 @@
 import (
 	"embed"
 	
-	"go.jolheiser.com/overlay"
+	"go.jolheiser.com/xtfs"
 )
 
 //go:embed assets
 var assets embed.FS
 
 func main() {
-	ofs, err := overlay.New("/var/lib/myapp/custom", assets)
+	xfs, err := xtfs.New("/var/lib/myapp/custom", assets)
 	if err != nil {
 		panic(err)
     }
@@ -38,14 +40,14 @@
 import (
 	"embed"
 	
-	"go.jolheiser.com/overlay"
+	"go.jolheiser.com/xtfs"
 )
 
 //go:embed assets
 var assets embed.FS
 
 func main() {
-	ofs, err := overlay.New("/var/lib/myapp/custom", assets, overlay.WithSub("assets"))
+	xfs, err := xtfs.New("/var/lib/myapp/custom", assets, xtfs.WithSub("assets"))
 	if err != nil {
 		panic(err)
     }
diff --git a/bench.txt b/bench.txt
index ba8bf45cbfa8cbd3d7b828835e06ca87a31b1fac..719cc74bfb761a6ae130e157433961678f621910 100644
--- a/bench.txt
+++ b/bench.txt
@@ -1,9 +1,9 @@
 go test -benchmem -bench=.
 goos: linux
 goarch: amd64
-pkg: go.jolheiser.com/overlay
+pkg: go.jolheiser.com/xtfs
 cpu: Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz
-BenchmarkCache-8     	134959974	         9.003 ns/op	       0 B/op	       0 allocs/op
+BenchmarkCache-8     	133917188	         8.970 ns/op	       0 B/op	       0 allocs/op
-BenchmarkNoCache-8   	  897212	      1369 ns/op	     280 B/op	       4 allocs/op
+BenchmarkNoCache-8   	  931821	      1362 ns/op	     280 B/op	       4 allocs/op
 PASS
-ok  	go.jolheiser.com/overlay	3.360s
+ok  	go.jolheiser.com/xtfs	3.394s
diff --git a/go.mod b/go.mod
index 82d8e4b497dda07afb4c40008ff664431d1e4a18..158d9ab2b80f36645fb38c03ef4e00dcc42ff541 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
-module go.jolheiser.com/overlay
+module go.jolheiser.com/xtfs
 
 go 1.16
diff --git a/overlay.go b/overlay.go
deleted file mode 100644
index 84410a2a79651f909e1094f3d032d758622e37f0..0000000000000000000000000000000000000000
--- a/overlay.go
+++ /dev/null
@@ -1,79 +0,0 @@
-package overlay
-
-import (
-	"io/fs"
-	"os"
-	"path"
-)
-
-// FS is an overlay File System
-type FS struct {
-	fs      fs.FS
-	root    string
-	doCache bool
-	cache   map[string]bool
-}
-
-func (f *FS) apn(name string) string {
-	return path.Join(f.root, name)
-}
-
-func (f *FS) exists(name string) bool {
-	if has, ok := f.cache[name]; ok && f.doCache {
-		return has
-	}
-	_, err := os.Stat(f.apn(name))
-	if err != nil {
-		f.cache[name] = false
-		return false
-	}
-	f.cache[name] = true
-	return true
-}
-
-// Open opens an fs.File, preferring disk
-func (f *FS) Open(name string) (fs.File, error) {
-	if f.exists(name) {
-		return os.Open(f.apn(name))
-	}
-	return f.fs.Open(name)
-}
-
-// Option is a functional option for an FS
-type Option func(*FS) error
-
-// New returns a new FS
-func New(root string, fs fs.FS, opts ...Option) (*FS, error) {
-	x := &FS{
-		fs:      fs,
-		root:    root,
-		doCache: true,
-		cache:   make(map[string]bool),
-	}
-
-	for _, opt := range opts {
-		if err := opt(x); err != nil {
-			return x, err
-		}
-	}
-
-	return x, nil
-}
-
-// WithSub sets a fs.Sub for an FS
-func WithSub(sub string) Option {
-	return func(x *FS) (err error) {
-		x.fs, err = fs.Sub(x.fs, sub)
-		return
-	}
-}
-
-// WithCaching sets a caching mode for an FS
-// Caching avoids subsequent os.Stat to determine if a file exists on disk
-// See bench.txt for differences in usage
-func WithCaching(doCache bool) Option {
-	return func(x *FS) error {
-		x.doCache = doCache
-		return nil
-	}
-}
diff --git a/overlay_test.go b/xtfs_test.go
rename from overlay_test.go
rename to xtfs_test.go
index 2992095d9383a209fd4a734b9914be20dc51c00a..c89f7dc86ed62688f6617715b5f8a0f350aac817 100644
--- a/overlay_test.go
+++ b/xtfs_test.go
@@ -1,4 +1,4 @@
-package overlay
+package xtfs
 
 import (
 	"embed"
@@ -15,8 +15,8 @@ func TestMain(m *testing.M) {
 	os.Exit(m.Run())
 }
 
-package overlay
 	"io"
+)
 	tt := []struct {
 		Name     string
 		File     string
@@ -56,7 +56,7 @@ 				t.FailNow()
 			}
 
 			if !strings.EqualFold(string(contents), tc.Expected) {
-				t.Logf("fs did not match:\n\tgot: %s\n\texpected: %s\n", string(contents), tc.Expected)
+				t.Logf("xtfs did not match:\n\tgot: %s\n\texpected: %s\n", string(contents), tc.Expected)
 				t.FailNow()
 			}
 		})
@@ -68,7 +68,7 @@
 func TestInvalid(t *testing.T) {
 	_, err := New("/var/lib/myapp/assets/custom", emptyFS)
 	if err != nil {
-		t.Log("invalid FS should not error explicitly")
+		t.Log("invalid XTFS should not error explicitly")
 		t.FailNow()
 	}
 }
diff --git a/xtfs.go b/xtfs.go
new file mode 100644
index 0000000000000000000000000000000000000000..eaa03cdf7823070ad7e94666615ff04d32c8ded9
--- /dev/null
+++ b/xtfs.go
@@ -0,0 +1,79 @@
+package xtfs
+
+import (
+	"io/fs"
+	"os"
+	"path"
+)
+
+// XTFS is an eXTended File System
+type XTFS struct {
+	fs      fs.FS
+	root    string
+	doCache bool
+	cache   map[string]bool
+}
+
+func (x *XTFS) apn(name string) string {
+	return path.Join(x.root, name)
+}
+
+func (x *XTFS) exists(name string) bool {
+	if has, ok := x.cache[name]; ok && x.doCache {
+		return has
+	}
+	_, err := os.Stat(x.apn(name))
+	if err != nil {
+		x.cache[name] = false
+		return false
+	}
+	x.cache[name] = true
+	return true
+}
+
+// Open opens an fs.File, preferring disk
+func (x *XTFS) Open(name string) (fs.File, error) {
+	if x.exists(name) {
+		return os.Open(x.apn(name))
+	}
+	return x.fs.Open(name)
+}
+
+// Option is a functional option for an XTFS
+type Option func(*XTFS) error
+
+// New returns a new XTFS
+func New(root string, fs fs.FS, opts ...Option) (*XTFS, error) {
+	x := &XTFS{
+		fs:      fs,
+		root:    root,
+		doCache: true,
+		cache:   make(map[string]bool),
+	}
+
+	for _, opt := range opts {
+		if err := opt(x); err != nil {
+			return x, err
+		}
+	}
+
+	return x, nil
+}
+
+// WithSub sets a fs.Sub for an XTFS
+func WithSub(sub string) Option {
+	return func(x *XTFS) (err error) {
+		x.fs, err = fs.Sub(x.fs, sub)
+		return
+	}
+}
+
+// WithCaching sets a caching mode for an XTFS
+// Caching avoids subsequent os.Stat to determine if a file exists on disk
+// See bench.txt for differences in usage
+func WithCaching(doCache bool) Option {
+	return func(x *XTFS) error {
+		x.doCache = doCache
+		return nil
+	}
+}