diff --git a/package.json b/package.json
index d2554ab..77fd518 100644
--- a/package.json
+++ b/package.json
@@ -58,6 +58,7 @@
     "postcss-nested": "^5.0.5",
     "ramda": "^0.27.1",
     "react": "^17.0.1",
+    "react-cool-dimensions": "^2.0.7",
     "react-div-100vh": "^0.7.0",
     "react-dom": "^17.0.1",
     "react-helmet": "^6.1.0",
diff --git a/src/breakpoints.js b/src/breakpoints.js
index 97aca46..4729111 100644
--- a/src/breakpoints.js
+++ b/src/breakpoints.js
@@ -4,7 +4,10 @@ const R = require('ramda')
 const resolveConfig = require('tailwindcss/resolveConfig');
 const tailwindConfig = require('../tailwind.config.js');
 const {theme} = resolveConfig(tailwindConfig);
-module.exports = R.map(size => parseInt(size, 10), theme.screens);
+module.exports = R.pipe(
+  R.map(size => parseInt(size, 10)),
+  R.filter(Boolean)
+)(theme.screens);
 `;
 
 export default themeBreakpoints;
diff --git a/src/components/Nav.js b/src/components/Nav.js
index 839855e..a47bc32 100644
--- a/src/components/Nav.js
+++ b/src/components/Nav.js
@@ -1,6 +1,9 @@
-import React from "react";
+import React, { useState } from "react";
 import classnames from "classnames";
 import { Link } from "gatsby";
+import useDimensions from "react-cool-dimensions";
+
+import ShowMenu from "@spectrum-icons/workflow/ShowMenu";
 
 const getNavClasses = (isClient) =>
   classnames(
@@ -8,80 +11,111 @@ const getNavClasses = (isClient) =>
     isClient ? "text-vibrant-light" : "text-gray-200"
   );
 
-const Nav = ({ isClient, internalLinks, className }) => (
-  <nav
-    className={classnames(
-      "m-2 flex justify-center font-sans",
-      isClient ? "text-vibrant-light" : "text-gray-200",
-      className
-    )}
-    style={{ zIndex: 100 }}
-  >
-    <div
+const Nav = ({ isClient, internalLinks, className }) => {
+  const { observe, currentBreakpoint } = useDimensions({
+    breakpoints: { XS: 0, LG: 670 },
+    updateOnBreakpointChange: true,
+  });
+  const [linksMenu, setLinksMenu] = useState(false);
+
+  return (
+    <nav
       className={classnames(
-        "rounded-full p-2 ]",
-        isClient
-          ? "bg-vibrant-dark cool-border-small-light"
-          : "border border-white"
+        "m-2 flex justify-center font-sans w-full",
+        isClient ? "text-vibrant-light" : "text-gray-200",
+        className
       )}
+      ref={observe}
+      style={{ zIndex: 100 }}
     >
-      <ul className="inline-flex flex-wrap justify-center">
-        {internalLinks &&
-          internalLinks.map(({ href, label }) => (
-            <li key={href}>
-              <Link
-                activeClassName="font-bold underline"
+      <div
+        className={classnames(
+          "rounded-full p-2",
+          isClient
+            ? "bg-vibrant-dark cool-border-small-light"
+            : "border border-white"
+        )}
+      >
+        <ul className="inline-flex flex-wrap justify-center">
+          {internalLinks &&
+            internalLinks.map(({ href, label }) => (
+              <li key={href}>
+                <Link
+                  activeClassName="font-bold underline"
+                  className={getNavClasses(isClient)}
+                  to={href}
+                >
+                  {label}
+                </Link>
+              </li>
+            ))}
+        </ul>
+        {internalLinks && currentBreakpoint === "LG" && <>|</>}
+        {currentBreakpoint === "XS" && (
+          <button
+            className="ml-2 hover:underline inline-flex align-middle"
+            onClick={() => setLinksMenu(!linksMenu)}
+          >
+            <ShowMenu
+              UNSAFE_className="mr-2"
+              aria-label="show external links"
+              size="S"
+            />
+          </button>
+        )}
+        {(currentBreakpoint === "LG" || linksMenu) && (
+          <ul
+            className={classnames(
+              currentBreakpoint === "LG"
+                ? "inline-flex flex-wrap justify-center"
+                : "fixed bg-vibrant-dark p-2 rounded-md cool-border-small-light right-4"
+            )}
+          >
+            <li>
+              <a
                 className={getNavClasses(isClient)}
-                to={href}
+                href="https://twitter.com/chuckletmilk"
               >
-                {label}
-              </Link>
+                Twitter
+              </a>
             </li>
-          ))}
-        {internalLinks && <>|</>}
-        <li>
-          <a
-            className={getNavClasses(isClient)}
-            href="https://twitter.com/chuckletmilk"
-          >
-            Twitter
-          </a>
-        </li>
-        <li>
-          <a
-            className={getNavClasses(isClient)}
-            href="https://www.instagram.com/asubtlebutdeliciouscoffeecake/"
-          >
-            Instagram
-          </a>
-        </li>
-        <li>
-          <a
-            className={getNavClasses(isClient)}
-            href="https://www.youtube.com/channel/UCknR_DdytuOgzus--b2gZhg"
-          >
-            YouTube
-          </a>
-        </li>
-        <li>
-          <a
-            className={getNavClasses(isClient)}
-            href="https://github.com/chuckdries"
-          >
-            GitHub
-          </a>
-        </li>
-        <li>
-          <a
-            className={getNavClasses(isClient)}
-            href="mailto:chuck@chuckdries.com"
-          >
-            chuck@chuckdries.com
-          </a>
-        </li>
-      </ul>
-    </div>
-  </nav>
-);
+            <li>
+              <a
+                className={getNavClasses(isClient)}
+                href="https://www.instagram.com/asubtlebutdeliciouscoffeecake/"
+              >
+                Instagram
+              </a>
+            </li>
+            <li>
+              <a
+                className={getNavClasses(isClient)}
+                href="https://www.youtube.com/channel/UCknR_DdytuOgzus--b2gZhg"
+              >
+                YouTube
+              </a>
+            </li>
+            <li>
+              <a
+                className={getNavClasses(isClient)}
+                href="https://github.com/chuckdries"
+              >
+                GitHub
+              </a>
+            </li>
+            <li>
+              <a
+                className={getNavClasses(isClient)}
+                href="mailto:chuck@chuckdries.com"
+              >
+                chuck@chuckdries.com
+              </a>
+            </li>
+          </ul>
+        )}
+      </div>
+    </nav>
+  );
+};
 
 export default Nav;
diff --git a/yarn.lock b/yarn.lock
index 8b18698..1a23221 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -12362,6 +12362,11 @@ rc@^1.2.7, rc@^1.2.8:
     minimist "^1.2.0"
     strip-json-comments "~2.0.1"
 
+react-cool-dimensions@^2.0.7:
+  version "2.0.7"
+  resolved "https://registry.yarnpkg.com/react-cool-dimensions/-/react-cool-dimensions-2.0.7.tgz#2fe6657608f034cd7c89f149ed14e79cf1cb2d50"
+  integrity sha512-z1VwkAAJ5d8QybDRuYIXTE41RxGr5GYsv1bQhbOBE8cMfoZQZpcF0odL64vdgrQVzat2jayedj1GoYi80FWcbA==
+
 react-dev-utils@^12.0.1:
   version "12.0.1"
   resolved "https://registry.yarnpkg.com/react-dev-utils/-/react-dev-utils-12.0.1.tgz#ba92edb4a1f379bd46ccd6bcd4e7bc398df33e73"