diff --git a/client/demo.js b/client/demo.js
index 9c0e467..b469edc 100644
--- a/client/demo.js
+++ b/client/demo.js
@@ -12,6 +12,7 @@ import initEpoxy, { EpoxyClient, EpoxyClientOptions, EpoxyHandlers, info as epox
 	const should_udp_test = params.has("udp_test");
 	const should_reconnect_test = params.has("reconnect_test");
 	const should_perf2_test = params.has("perf2_test");
+	const should_wisptransport = params.has("wisptransport");
 	console.log(
 		"%cWASM is significantly slower with DevTools open!",
 		"color:red;font-size:3rem;font-weight:bold"
@@ -29,7 +30,18 @@ import initEpoxy, { EpoxyClient, EpoxyClientOptions, EpoxyHandlers, info as epox
 	let epoxy_client_options = new EpoxyClientOptions();
 	epoxy_client_options.user_agent = navigator.userAgent;
 
-	let epoxy_client = new EpoxyClient("ws://localhost:4000", epoxy_client_options);
+	let epoxy_client;
+
+	if (should_wisptransport) {
+		log("using wisptransport with websocketstream backend");
+		epoxy_client = new EpoxyClient(async () => {
+			let wss = new WebSocketStream("ws://localhost:4000/");
+			let {readable, writable} = await wss.opened;
+			return {read: readable, write: writable};
+		}, epoxy_client_options);
+	} else {
+		epoxy_client = new EpoxyClient("ws://localhost:4000/", epoxy_client_options);
+	}
 
 	const tconn0 = performance.now();
 	await epoxy_client.replace_stream_provider();
diff --git a/client/src/lib.rs b/client/src/lib.rs
index 0196ebd..da00140 100644
--- a/client/src/lib.rs
+++ b/client/src/lib.rs
@@ -30,7 +30,7 @@ use utils::{
 use wasm_bindgen::prelude::*;
 use wasm_bindgen_futures::JsFuture;
 use wasm_streams::ReadableStream;
-use web_sys::ResponseInit;
+use web_sys::{ResponseInit, WritableStream};
 #[cfg(feature = "full")]
 use websocket::EpoxyWebSocket;
 #[cfg(feature = "full")]
@@ -117,7 +117,11 @@ pub enum EpoxyError {
 
 impl EpoxyError {
 	pub fn wisp_transport(value: JsValue) -> Self {
-		Self::WispTransport(format!("{:?}", value))
+		if let Some(err) = value.dyn_ref::<js_sys::Error>() {
+			Self::WispTransport(err.to_string().into())
+		} else {
+			Self::WispTransport(format!("{:?}", value))
+		}
 	}
 }
 
@@ -299,13 +303,11 @@ impl EpoxyClient {
 								.into_stream(),
 							),
 						};
+						let write: WritableStream = object_get(&transport, "write").into();
 						let write = WispTransportWrite {
-							inner: Some(SendWrapper::new(
-								wasm_streams::WritableStream::from_raw(
-									object_get(&transport, "write").into(),
-								)
-								.into_sink(),
-							)),
+							inner: SendWrapper::new(
+								write.get_writer().map_err(EpoxyError::wisp_transport)?,
+							),
 						};
 
 						Ok((
diff --git a/client/src/utils.rs b/client/src/utils.rs
index d7d8935..fa507ff 100644
--- a/client/src/utils.rs
+++ b/client/src/utils.rs
@@ -5,14 +5,16 @@ use std::{
 
 use async_trait::async_trait;
 use bytes::{buf::UninitSlice, BufMut, Bytes, BytesMut};
-use futures_util::{ready, AsyncRead, Future, SinkExt, Stream, StreamExt, TryStreamExt};
+use futures_util::{ready, AsyncRead, Future, Stream, StreamExt, TryStreamExt};
 use http::{HeaderValue, Uri};
 use hyper::{body::Body, rt::Executor};
 use js_sys::{Array, ArrayBuffer, JsString, Object, Uint8Array};
 use pin_project_lite::pin_project;
 use send_wrapper::SendWrapper;
 use wasm_bindgen::{prelude::*, JsCast, JsValue};
-use wasm_streams::{readable::IntoStream, writable::IntoSink};
+use wasm_bindgen_futures::JsFuture;
+use wasm_streams::readable::IntoStream;
+use web_sys::WritableStreamDefaultWriter;
 use wisp_mux::{
 	ws::{Frame, LockedWebSocketWrite, Payload, WebSocketRead, WebSocketWrite},
 	WispError,
@@ -204,32 +206,27 @@ impl WebSocketRead for WispTransportRead {
 }
 
 pub struct WispTransportWrite {
-	pub inner: Option<SendWrapper<IntoSink<'static>>>,
+	pub inner: SendWrapper<WritableStreamDefaultWriter>,
 }
 
 #[async_trait]
 impl WebSocketWrite for WispTransportWrite {
 	async fn wisp_write_frame(&mut self, frame: Frame<'_>) -> Result<(), WispError> {
-		SendWrapper::new(
-			self.inner
-				.as_mut()
-				.ok_or_else(|| WispError::WsImplError(Box::new(EpoxyError::WispTransportClosed)))?
-				.send(Uint8Array::from(frame.payload.as_ref()).into()),
-		)
+		SendWrapper::new(async {
+			let chunk = Uint8Array::from(frame.payload.as_ref()).into();
+			JsFuture::from(self.inner.write_with_chunk(&chunk))
+				.await
+				.map(|_| ())
+				.map_err(|x| WispError::WsImplError(Box::new(EpoxyError::wisp_transport(x))))
+		})
 		.await
-		.map_err(|x| WispError::WsImplError(Box::new(EpoxyError::wisp_transport(x))))
 	}
 
 	async fn wisp_close(&mut self) -> Result<(), WispError> {
-		SendWrapper::new(
-			self.inner
-				.take()
-				.ok_or_else(|| WispError::WsImplError(Box::new(EpoxyError::WispTransportClosed)))?
-				.take()
-				.abort(),
-		)
-		.await
-		.map_err(|x| WispError::WsImplError(Box::new(EpoxyError::wisp_transport(x))))
+		SendWrapper::new(JsFuture::from(self.inner.abort()))
+			.await
+			.map(|_| ())
+			.map_err(|x| WispError::WsImplError(Box::new(EpoxyError::wisp_transport(x))))
 	}
 }