wrapper-start.php

<?php
/**
 * Content wrappers
 *
 * This template can be overridden by copying it to yourtheme/woocommerce/global/wrapper-start.php.
 *
 * HOWEVER, on occasion WooCommerce will need to update template files and you
 * (the theme developer) will need to copy the new files to your theme to
 * maintain compatibility. We try to do this as little as possible, but it does
 * happen. When this occurs the version of the template file will be bumped and
 * the readme will list any important changes.
 *
 * @see         https://docs.woocommerce.com/document/template-structure/
 * @author      WooThemes
 * @package     WooCommerce/Templates
 * @version     1.6.4
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit; // Exit if accessed directly
}
?>

<?php
if ( is_product() ) :
    $bimber_class = array(
                'g1-row',
                'g1-row-layout-page',
            );
    if ( bimber_show_breadcrumbs() ) {
        $bimber_class[] = 'g1-row-padding-m';
    }
?>
    <div class="<?php echo implode( ' ', array_map( 'sanitize_html_class', $bimber_class ) ); ?>">
        <div class="g1-row-background">
        </div>
        <div class="g1-row-inner">
            <div class="g1-column g1-column-2of3" id="primary">
                <div id="content" role="main">
<?php else : ?>
    <div class="g1-row g1-row-layout-page g1-row-padding-m archive-body">
        <div class="g1-row-inner">

            <?php if ( bimber_woocommerce_page_has_sidebar() ) : ?>
                <div class="g1-column g1-column-2of3">
            <?php else : ?>
                <div class="g1-column">
            <?php  endif; ?>
<?php endif;