diff --git a/chunk/chunk.go b/chunk/chunk.go
new file mode 100644
index 0000000..8d55fe0
--- /dev/null
+++ b/chunk/chunk.go
@@ -0,0 +1,35 @@
+package chunk
+
+import "bytes"
+import "io"
+
+type Chunk interface {
+	SizeBytes() int
+	ReadSeeker() io.ReadSeeker
+	Writer() io.Writer
+}
+
+type InMemoryChunk struct {
+	payload *[]byte
+}
+
+func NewEmptyInMemoryChunk(sizeBytes int) Chunk {
+	payload := make([]byte, sizeBytes)
+	return &InMemoryChunk{payload: &payload}
+}
+
+func NewInMemoryChunk(p *[]byte) Chunk {
+	return &InMemoryChunk{payload: p}
+}
+
+func (c *InMemoryChunk) SizeBytes() int {
+	return len(*c.payload)
+}
+
+func (c *InMemoryChunk) ReadSeeker() io.ReadSeeker {
+	return bytes.NewReader(*c.payload)
+}
+
+func (c *InMemoryChunk) Writer() io.Writer {
+	return bytes.NewBuffer(*c.payload)
+}