Background image with wp_get_attachment_image_srcset();

I’m trying to load a background image with wp_get_attachment_image_srcset insted of wp_get_attachment_image_src. When I replace my original code, my image doesn’t show up. Am I missing a step? Here is my code:

	<?php $feature = wp_get_attachment_image_srcset( get_post_thumbnail_id($post->ID), '' );?>
   <section id="article-banner" class="animated fadeIn" style="background-image: url('<?php echo $feature['0'];?>');background-position:<?php the_field('alignment'); ?>;" title="<?php echo  $feature['title'];?>"> 
	
	</section>

Any help is greatly appreciated.

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