diff --git a/source/lib/style/classes/protection.js b/source/lib/style/classes/protection.js
new file mode 100644
index 0000000..efcd69f
--- /dev/null
+++ b/source/lib/style/classes/protection.js
@@ -0,0 +1,57 @@
+const xmlbuilder = require('xmlbuilder');
+
+class Protection { // §18.8.1 protection (Protection)
+    /**
+     * @class Protection
+     * @param {Object} opts Properties of Protection object
+     * @param {Boolean} opts.hidden Indicates if text should be shrunk to fit into cell
+     * @param {Boolean} opts.locked States whether text with newline characters should wrap
+     * @returns {Protection}
+     */
+    constructor(opts) {
+
+        if (opts.hidden !== undefined) {
+            if (typeof opts.hidden === 'boolean') {
+                this.hidden = opts.hidden;
+            } else {
+                throw new TypeError('hidden protection option must be of type boolean');
+            }
+        }
+
+        if (opts.locked !== undefined) {
+            if (typeof opts.locked === 'boolean') {
+                this.locked = opts.locked;
+            } else {
+                throw new TypeError('locked protection option must be of type boolean');
+            }
+        }
+    }
+
+    /** 
+     * @func Protection.toObject
+     * @desc Converts the Protection instance to a javascript object
+     * @returns {Object}
+     */
+    toObject() {
+        let obj = {};
+
+        this.hidden !== undefined ? obj.hidden = this.hidden : null;
+        this.locked !== undefined ? obj.locked = this.locked : null;
+
+        return obj;
+    }
+
+    /**
+     * @alias Protection.addToXMLele
+     * @desc When generating Workbook output, attaches style to the styles xml file
+     * @func Protection.addToXMLele
+     * @param {xmlbuilder.Element} ele Element object of the xmlbuilder module
+     */
+    addToXMLele(ele) {
+        let thisEle = ele.ele('protection');
+        this.hidden === true ? thisEle.att('hidden', 1) : null;
+        this.locked === true ? thisEle.att('locked', 1) : null;
+    }
+}
+
+module.exports = Protection;
\ No newline at end of file
diff --git a/source/lib/style/style.js b/source/lib/style/style.js
index 9e04422..798a491 100644
--- a/source/lib/style/style.js
+++ b/source/lib/style/style.js
@@ -6,6 +6,7 @@ const Border = require('./classes/border.js');
 const Fill = require('./classes/fill.js');
 const Font = require('./classes/font.js');
 const NumberFormat = require('./classes/numberFormat.js');
+const Protection = require('./classes/protection.js');
 
 let _getFontId = (wb, font = {}) => {
 
@@ -142,7 +143,11 @@ let _getNumFmt = (wb, val) => {
             patternType: 'solid',
             color: 'Yellow'
         },
-        numberFormat: integer or string // §18.8.30 numFmt (Number Format)
+        numberFormat: integer or string, // §18.8.30 numFmt (Number Format)
+        protection: { // §18.8.1
+            hidden: boolean,
+            locked: boolean
+        },
     }
 */
 class Style {
@@ -158,6 +163,7 @@ class Style {
          * @param {Object} opts.border Options for creating a Border instance
          * @param {Object} opts.fill Options for creating a Fill instance
          * @param {String} opts.numberFormat
+         * @param {Object} opts.protection Options for creating a Protection instance
          * @property {Alignment} alignment Alignment instance associated with Style
          * @property {Border} border Border instance associated with Style
          * @property {Number} borderId ID of Border instance in the Workbook
@@ -166,6 +172,7 @@ class Style {
          * @property {Font} font Font instance associated with Style
          * @property {Number} fontId ID of Font instance in the Workbook
          * @property {String} numberFormat String represenation of the way a number should be formatted
+         * @property {Protection} protection Protection instance associated with Style
          * @property {Number} xf XF id of the Style in the Workbook
          * @returns {Style} 
          */
@@ -202,6 +209,10 @@ class Style {
             this.pivotButton = null; // attribute boolean
         }
 
+        if (opts.protection !== undefined) {
+            this.protection = new Protection(opts.protection);
+        }
+
         if (opts.quotePrefix !== undefined) {
             this.quotePrefix = null; // attribute boolean
         }
@@ -240,6 +251,11 @@ class Style {
             thisXF.alignment = this.alignment;
         }
 
+        if (this.protection instanceof Protection) {
+            thisXF.applyProtection = 1;
+            thisXF.protection = this.protection;
+        }
+
         return thisXF;
     }
 
@@ -273,10 +289,14 @@ class Style {
         if (this.alignment instanceof Alignment) {
             obj.alignment = this.alignment.toObject();
         }
-
+        
         if (this.pivotButton !== undefined) {
             obj.pivotButton = this.pivotButton;
         }
+        
+        if (this.protection instanceof Protection) {
+            obj.protection = this.protection.toObject();
+        }
 
         if (this.quotePrefix !== undefined) {
             obj.quotePrefix = this.quotePrefix;
@@ -295,7 +315,7 @@ class Style {
         let thisEle = ele.ele('xf');
         let thisXF = this.xf;
         Object.keys(thisXF).forEach((a) => {
-            if (a === 'alignment') {
+            if (a === 'alignment' || a === 'protection') {
                 thisXF[a].addToXMLele(thisEle);
             } else {
                 thisEle.att(a, thisXF[a]);
@@ -327,10 +347,14 @@ class Style {
         if (this.alignment instanceof Alignment) {
             this.alignment.addToXMLele(thisEle);
         }
-
+        
         if (this.border instanceof Border) {
             this.border.addToXMLele(thisEle);
         }
+        
+        if (this.protection instanceof Protection) {
+            this.protection.addToXMLele(thisEle);
+        }
     }
 }