diff --git a/elements.less b/elements.less
index 6df8c27..5a9ee1a 100644
--- a/elements.less
+++ b/elements.less
@@ -109,6 +109,18 @@
   -moz-box-shadow: @arguments;
   box-shadow: @arguments;
 }
+.box-sizing(@sizing: border-box) {
+  -ms-box-sizing: @sizing;
+  -moz-box-sizing: @sizing;
+  -webkit-box-sizing: @sizing;
+  box-sizing: @sizing;
+}
+.user-select(@argument: none) {
+  -webkit-user-select: @argument;
+  -moz-user-select: @argument;
+  -ms-user-select: @argument;
+  user-select: @argument;
+}
 .columns(@colwidth: 250px, @colcount: 0, @colgap: 50px, @columnRuleColor: #EEE, @columnRuleStyle: solid, @columnRuleWidth: 1px) {
   -moz-column-width: @colwidth;
   -moz-column-count: @colcount;
@@ -136,3 +148,4 @@
   -ms-transform: translate(@x, @y);
   transform: translate(@x, @y);
 }
+