Nautica Grappo Slip-On Synthetic Mens Flip-Flops N7CRF018. Show your style this summer in the Grappo sliders. Available in a range of colours, these sliders are perfect for all outfits. They feature a neoprene lining, giving a comfortable and stylish shoe. Complete with the Nautica Competition branding, you can show your style. Made from the highest quality material.