diff --git a/src/sliceActions/addBrim.js b/src/sliceActions/addBrim.js
index 6307e9b..f3e7627 100644
--- a/src/sliceActions/addBrim.js
+++ b/src/sliceActions/addBrim.js
@@ -27,9 +27,10 @@ export default function addBrim(slices, settings) {
     }))
   ), new Shape([], true)).simplify('pftNonZero');
 
-  firstLayer.brim = [];
+  firstLayer.brim = new Shape([], true);
+
   for (let offset = 0; offset < brimSize; offset += nozzleDiameter) {
     const brimPart = brim.offset(offset, offsetOptions);
-    firstLayer.brim.unshift(brimPart);
+    firstLayer.brim = firstLayer.brim.join(brimPart);
   }
 }
diff --git a/src/sliceActions/optimizePaths.js b/src/sliceActions/optimizePaths.js
index 7def91d..661e7e0 100644
--- a/src/sliceActions/optimizePaths.js
+++ b/src/sliceActions/optimizePaths.js
@@ -7,13 +7,9 @@ export default function optimizePaths(slices, settings) {
   for (let layer = 0; layer < slices.length; layer ++) {
     const slice = slices[layer];
 
-    if (typeof slice.brim !== 'undefined') {
-      for (let i = 0; i < slice.brim.length; i ++) {
-        if (slice.brim[i].paths.length > 0) {
-          slice.brim[i] = optimizeShape(slice.brim[i], start);
-          start.copy(slice.brim[i].lastPoint(true));
-        }
-      }
+    if (typeof slice.brim !== 'undefined' && slice.brim.paths.length > 0) {
+      slice.brim = optimizeShape(slice.brim, start);
+      start.copy(slice.brim.lastPoint(true));
     }
 
     const parts = [];
diff --git a/src/sliceActions/removePrecision.js b/src/sliceActions/removePrecision.js
index a237a06..2ecd8df 100644
--- a/src/sliceActions/removePrecision.js
+++ b/src/sliceActions/removePrecision.js
@@ -25,9 +25,7 @@ export default function removePrecision(slices) {
       slice.support.scaleDown(inversePrecision);
     }
     if (typeof slice.brim !== 'undefined') {
-      for (let i = 0; i < slice.brim.length; i ++) {
-        slice.brim[i].scaleDown(inversePrecision);
-      }
+      slice.brim.scaleDown(inversePrecision);
     }
   }
 }
diff --git a/src/sliceActions/slicesToGCode.js b/src/sliceActions/slicesToGCode.js
index 049bab5..cbc38a2 100644
--- a/src/sliceActions/slicesToGCode.js
+++ b/src/sliceActions/slicesToGCode.js
@@ -48,9 +48,7 @@ export default function slicesToGCode(slices, settings) {
     }, {});
 
     if (typeof slice.brim !== 'undefined') {
-      for (let i = 0; i < slice.brim.length; i ++) {
-        pathToGCode(null, false, gcode, slice.brim[i], false, false, z, profiles.brim);
-      }
+      pathToGCode(null, false, gcode, slice.brim, true, true, z, profiles.brim);
     }
 
     for (let i = 0; i < slice.parts.length; i ++) {