diff --git a/src/app.js b/src/app.js
index 798abe1..0794220 100644
--- a/src/app.js
+++ b/src/app.js
@@ -1,10 +1,12 @@
 import React, { Fragment } from 'react';
 import { Map } from '@components/map';
+import { Sidebar } from '@components/sidebar';
 
 export const App = () => {
   return (
     <Fragment>
-      <Map />
+      <Map/>
+      <Sidebar />
     </Fragment>
   );
 };
diff --git a/src/components/map/default-layers.js b/src/components/map/default-layers.js
index f86f3b7..b0c3f35 100644
--- a/src/components/map/default-layers.js
+++ b/src/components/map/default-layers.js
@@ -90,7 +90,12 @@ export const DefaultLayers = () => {
               data.workbench.forEach(function (layer_id) {
                 const layer = getCatalogEntry(data.catalog, layer_id);
                 if (layer)
-                    layer_list.push(layer);
+                    layer_list.push({
+                        ...layer,
+                        state: {
+                            visible: true,
+                        }
+                    });
 
                     // TODO: do we really need to do this here??!
                     // if this is an obs layer, need to retrieve
diff --git a/src/components/sidebar/menu-item.js b/src/components/sidebar/menu-item.js
index bd0dcce..4afcc69 100644
--- a/src/components/sidebar/menu-item.js
+++ b/src/components/sidebar/menu-item.js
@@ -1,6 +1,5 @@
 import React from 'react';
 import PropTypes from 'prop-types';
-
 import {
   IconButton,
   ListItem,
diff --git a/src/components/sidebar/sidebar.js b/src/components/sidebar/sidebar.js
index c562712..20ecc19 100644
--- a/src/components/sidebar/sidebar.js
+++ b/src/components/sidebar/sidebar.js
@@ -1,4 +1,5 @@
-import React, { Fragment, useCallback, useState } from 'react';
+import React from 'react';
+import { Fragment, useCallback, useState } from 'react';
 import {
   List,
   Sheet,
@@ -17,7 +18,7 @@ export const Sidebar = () => {
       setActiveIndex(-1);
       return;
     }
-    // otherwise, open the desired tray.
+    // otherwise, open desired tray.
     setActiveIndex(newIndex);
   }, [activeIndex]);
 
diff --git a/src/components/sidebar/toggler.js b/src/components/sidebar/toggler.js
index 4bc497b..f76bee0 100644
--- a/src/components/sidebar/toggler.js
+++ b/src/components/sidebar/toggler.js
@@ -1,4 +1,5 @@
-import React, { IconButton } from '@mui/joy';
+import React from 'react';
+import { IconButton } from '@mui/joy';
 import {
   Menu as HamburgerIcon,
   Close as CloseMenuIcon,
diff --git a/src/components/sidebar/tray.js b/src/components/sidebar/tray.js
index b45d5a9..8491684 100644
--- a/src/components/sidebar/tray.js
+++ b/src/components/sidebar/tray.js
@@ -1,6 +1,5 @@
 import React from 'react';
 import PropTypes from 'prop-types';
-
 import {
   DialogContent,
   DialogTitle,
diff --git a/src/components/trays/layers/list.js b/src/components/trays/layers/list.js
index 3ea317a..c02144d 100644
--- a/src/components/trays/layers/list.js
+++ b/src/components/trays/layers/list.js
@@ -3,6 +3,7 @@ import {
   Accordion,
   AccordionGroup,
   AccordionDetails,
+  Box,
   Divider,
   IconButton,
   ListItemContent,
@@ -11,30 +12,28 @@ import {
   Typography,
 } from '@mui/joy';
 import {
+  DragIndicator as DragHandleIcon,
   KeyboardArrowDown as ExpandIcon,
 } from '@mui/icons-material';
-import { DragIndicator as DragHandleIcon } from '@mui/icons-material';
-
-const dummyLayers = [
-  {
-    id: '234567',
-    name: 'Ullamco anim ad',
-  },
-  {
-    id: '0987654',
-    name: 'In ad tempor',
-  },
-  {
-    id: '9846351',
-    name: 'Eu in laborum',
-  },
-];
+import { useLayers } from '@context';
 
 export const LayersList = () => {
+  const { defaultModelLayers, toggleLayerVisibility } = useLayers();
+  const layers = [...defaultModelLayers];
+
+  // convert the product type to a readable layer name
+  const layer_names = {
+    obs: "Observations",
+    maxwvel63: "Maximum Wind Velocity",
+    maxele63: "Maximum Water Level",
+    swan_HS_max63: "Maximum Wave Height",
+    maxele_level_downscaled_epsg4326: "Hi-Res Maximum Water Level",
+    hec_ras_water_surface: "HEC/RAS Water Surface",
+  };
+
+  console.table(layers[0]);
+
   const [expandedIds, setExpandedIds] = useState(new Set());
-  // of course, this is dummy state.
-  // real state will be maintained in some higher-up context.
-  const [visibleIds, setVisibleIds] = useState(new Set());
 
   const handleToggleExpansion = id => () => {
     const _expandedIds = new Set([...expandedIds]);
@@ -47,29 +46,22 @@ export const LayersList = () => {
     setExpandedIds(_expandedIds);
   };
 
-  const handleToggleVisibilitySwitch = id => () => {
-    const _visibleIds = new Set([...visibleIds]);
-    if (_visibleIds.has(id)) {
-      _visibleIds.delete(id);
-      setVisibleIds(_visibleIds);
-      return;
-    }
-    _visibleIds.add(id);
-    setVisibleIds(_visibleIds);
-  };
-
   return (
     <AccordionGroup variant="soft">
       {
-        dummyLayers.map(layer => {
+        layers.map(layer => {
           const isExpanded = expandedIds.has(layer.id);
-          const isVisible = visibleIds.has(layer.id);
+          const isVisible = layer.state.visible;
+          const layerTitle = layer_names[layer.properties.product_type] + " " +
+                        layer.properties.run_date + " " +
+                        layer.properties.cycle;
+
 
           return (
             <Accordion
               key={ `layer-${ layer.id }-${ isVisible ? 'visible' : 'hidden' }` }
               expanded={ isExpanded }
-              onChange={ handleToggleVisibilitySwitch }
+              onChange={ handleToggleExpansion }
               sx={{ p: 0 }}
             >
               {/*
@@ -107,18 +99,25 @@ export const LayersList = () => {
 
                 <ListItemContent>
                   <Typography level="title-md">
-                    { layer.name }
+                    {layerTitle}
                   </Typography>
-                  <Typography level="body-sm">
-                    some details.
-                    some details.
+                  <Typography
+                    component="div"
+                    level="body-sm"
+                    sx={{
+                      overflow: 'hidden',
+                      textOverflow: 'ellipsis',
+                      whiteSpace: 'nowrap',
+                    }}
+                  >
+                    { layer.layers }
                   </Typography>
                 </ListItemContent>
 
                 <Switch
                   size="sm"
-                  onChange={ handleToggleVisibilitySwitch(layer.id) }
                   checked={ isVisible }
+                  onChange={ () => toggleLayerVisibility(layer.id) }
                 />
 
                 <IconButton onClick={ handleToggleExpansion(layer.id) }>
@@ -131,11 +130,18 @@ export const LayersList = () => {
                   />
                 </IconButton>
               </Stack>
-              <AccordionDetails variant="soft" sx={{
+              <AccordionDetails variant="solid" sx={{
                 // remove default margin that doesn't work well in our situation.
                 marginInline: 0,
               }}>
-                Lorem ipsum ad deserunt adipisicing deserunt sint deserunt qui occaecat consequat aliquip.
+                <Box component="pre" sx={{
+                  fontSize: '75%',
+                  color: '#def',
+                  backgroundColor: 'transparent',
+                  overflowX: 'auto',
+                }}>
+                  { JSON.stringify(layer.properties, null, 2) }
+                </Box>
               </AccordionDetails>
             </Accordion>
           );
diff --git a/src/context/map-context.js b/src/context/map-context.js
index da1f29a..e185f0e 100644
--- a/src/context/map-context.js
+++ b/src/context/map-context.js
@@ -5,9 +5,25 @@ export const LayersContext = createContext({});
 export const useLayers = () => useContext(LayersContext);
 
 export const LayersProvider = ({ children }) => {
-    const [defaultModelLayers, setDefaultModelLayers] = useState([]);
-    const [filteredModelLayers, setFilteredModelLayers] = useState([]);
-    const [map, setMap] = useState(null);
+  const [defaultModelLayers, setDefaultModelLayers] = useState([]);
+  const [filteredModelLayers, setFilteredModelLayers] = useState([]);
+  const [map, setMap] = useState(null);
+
+  const toggleLayerVisibility = id => {
+    const newLayers = [...defaultModelLayers];
+    const index = newLayers.findIndex(l => l.id === id);
+    if (index === -1) {
+      new Error('Could not locate layer', id);
+      return;
+    }
+    const alteredLayer = newLayers[index];
+    alteredLayer.state.visible = !alteredLayer.state.visible;
+    setDefaultModelLayers([
+      ...newLayers.slice(0, index),
+      { ...alteredLayer },
+      ...newLayers.slice(index + 1),
+    ]);
+  };
 
   return (
     <LayersContext.Provider
@@ -17,7 +33,8 @@ export const LayersProvider = ({ children }) => {
         defaultModelLayers,
         setDefaultModelLayers,
         filteredModelLayers,
-        setFilteredModelLayers
+        setFilteredModelLayers,
+        toggleLayerVisibility,
       }}
     >
       {children}
diff --git a/src/index.js b/src/index.js
index bc2585d..d5ea0a3 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,14 +1,18 @@
 import React from 'react';
 import { App } from './app';
 import { createRoot } from 'react-dom/client';
-import { LayersProvider } from '@context';
+import { LayersProvider, SettingsProvider } from '@context';
 import './index.css';
 
 const container = document.getElementById('root');
 const root = createRoot(container);
 
-root.render(
-  <LayersProvider>
-    <App />
-  </LayersProvider>
+const ProvisionedApp = () => (
+  <SettingsProvider>
+    <LayersProvider>
+      <App />
+    </LayersProvider>
+  </SettingsProvider>
 );
+
+root.render(<ProvisionedApp />);