public function get_cart_contents_weight() {
		$weight = 0;

		foreach ( $this->get_cart() as $cart_item_key => $values ) {
			if ( $values['data']->has_weight() ) {
				$weight += (float) $values['data']->get_weight() * $values['quantity'];
			}
		}

		return apply_filters( 'woocommerce_cart_contents_weight', $weight );
	}