diff --git a/src/upload/admin/model/extension/retailcrm/icml.php b/src/upload/admin/model/extension/retailcrm/icml.php
index 5187470..1963ee9 100644
--- a/src/upload/admin/model/extension/retailcrm/icml.php
+++ b/src/upload/admin/model/extension/retailcrm/icml.php
@@ -293,6 +293,7 @@ class ModelExtensionRetailcrmIcml extends Model
                             )
                         )
                     );
+
                 // Options
                 if (!empty($options)) {
                     foreach($options as $optionKey => $optionData) {
@@ -314,10 +315,12 @@ class ModelExtensionRetailcrmIcml extends Model
                     $weight = $this->dd->createElement('param');
                     $weight->setAttribute('code', 'weight');
                     $weight->setAttribute('name', $this->language->get('weight'));
-                    $weightValue = (isset($product['weight_class']))
-                        ? round($product['weight'], 3) . ' ' . $product['weight_class']
-                        : round($product['weight'], 3)
-                    ;
+                    $weightValue = round($product['weight'] + $optionsValues['weight'], 3);
+
+                    if (isset($product['weight_class'])) {
+                        $weightValue = $weightValue . ' ' . $product['weight_class'];
+                    }
+
                     $weight->appendChild($this->dd->createTextNode($weightValue));
                     $e->appendChild($weight);
                 }
diff --git a/src/upload/system/library/retailcrm/retailcrm.php b/src/upload/system/library/retailcrm/retailcrm.php
index d010712..12ce31f 100644
--- a/src/upload/system/library/retailcrm/retailcrm.php
+++ b/src/upload/system/library/retailcrm/retailcrm.php
@@ -150,7 +150,8 @@ class Retailcrm {
                 foreach($requiredOption['product_option_value'] as $optionValue) {
                     $offers[$requiredOption['product_option_id'].':'.$requiredOption['option_id'].'-'.$optionValue['option_value_id']] = array(
                         'price' => (float)$this->getOptionPrice($optionValue),
-                        'qty' => $optionValue['quantity']
+                        'qty' => $optionValue['quantity'],
+                        'weight' => round($this->getWeightOption($optionValue), 3)
                     );
                 }
             } else {
@@ -160,7 +161,8 @@ class Retailcrm {
                         $offers[$optionKey.'_'.$requiredOption['product_option_id'].':'.$requiredOption['option_id'].'-'.$optionValue['option_value_id']] = array(
                             'price' => $optionAttr['price'] + (float)$this->getOptionPrice($optionValue),
                             'qty' => ($optionAttr['qty'] > $optionValue['quantity']) ?
-                                $optionValue['quantity'] : $optionAttr['qty']
+                                $optionValue['quantity'] : $optionAttr['qty'],
+                            'weight' => round($optionAttr['weight'] + $this->getWeightOption($optionValue), 3)
                         );
                     }
                 }
@@ -173,7 +175,8 @@ class Retailcrm {
                 foreach($notRequiredOption['product_option_value'] as $optionValue) {
                     $offers[$notRequiredOption['product_option_id'].':'.$notRequiredOption['option_id'].'-'.$optionValue['option_value_id']] = array(
                         'price' => (float)$this->getOptionPrice($optionValue),
-                        'qty' => $optionValue['quantity']
+                        'qty' => $optionValue['quantity'],
+                        'weight' => round($this->getWeightOption($optionValue), 3)
                     );
                 }
             } else {
@@ -182,7 +185,8 @@ class Retailcrm {
                         $offers[$optionKey.'_'.$notRequiredOption['product_option_id'].':'.$notRequiredOption['option_id'].'-'.$optionValue['option_value_id']] = array(
                             'price' => $optionAttr['price'] + (float)$this->getOptionPrice($optionValue),
                             'qty' => ($optionAttr['qty'] > $optionValue['quantity']) ?
-                                $optionValue['quantity'] : $optionAttr['qty']
+                                $optionValue['quantity'] : $optionAttr['qty'],
+                            'weight' => round($optionAttr['weight'] + $this->getWeightOption($optionValue), 3)
                         );
                     }
                 }
@@ -196,6 +200,19 @@ class Retailcrm {
         return $offers;
     }
 
+    /**
+     * @param array $option
+     *
+     * @return  float
+     */
+    private function getWeightOption($option) {
+        if ($option['weight_prefix'] === '-') {
+            return $option['weight'] * -1;
+        }
+
+        return $option['weight'];
+    }
+
     /**
      * @param array $optionValue
      * @return float|int|mixed
diff --git a/tests/system/RetailcrmTest.php b/tests/system/RetailcrmTest.php
index 76ff790..6be8d10 100644
--- a/tests/system/RetailcrmTest.php
+++ b/tests/system/RetailcrmTest.php
@@ -3,6 +3,7 @@
 require_once __DIR__ . '/../' . getenv('TEST_SUITE') . '/TestCase.php';
 
 class RetailcrmTest extends TestCase {
+
     public function testGetOrderManager() {
         $retailcrm = new retailcrm\Retailcrm(static::$registry);
 
@@ -15,4 +16,26 @@ class RetailcrmTest extends TestCase {
 
         $this->assertInstanceOf(\retailcrm\service\OrderManager::class, $manager);
     }
+
+    public function testGetWeightOption() {
+        $retailCrm = new \retailcrm\Retailcrm(self::$registry);
+
+        $reflection = new ReflectionClass($retailCrm);
+        $reflectionMethod = $reflection->getMethod('getWeightOption');
+        $reflectionMethod->setAccessible('true');
+
+        $result = $reflectionMethod->invokeArgs(
+            $retailCrm,
+            [['weight_prefix' => '+', 'weight' => 5]]
+        );
+
+        $this->assertEquals(5, $result);
+
+        $result = $reflectionMethod->invokeArgs(
+            $retailCrm,
+            [['weight_prefix' => '-', 'weight' => 5]]
+        );
+
+        $this->assertEquals(-5, $result);;
+    }
 }