Design Philosophy The new Shacket brings some classic workwear styling to the Hummvee collection. Equally at home keeping you warm on a quick ride to the shops or being used in a late night of bike tinkering in the garage the Hummvee Shacket is the perfect versatile, do it all layer. Durable Fabrics Keeping true to the workwear inspiration behind this jacket, it features a super tough cotton mix outer fabric and a PFC-free DWR coating to add additional functionality to this carefully constructed product.