Design Philosophy. Outdoor lifestyle, athleisure, activewear- call it what you like, the growth in popularity of crossover technical streetwear continues and the Hummvee Windshell slots straight in with a classic, versatile windproof fabric in a street or trial friendly cut. the wide range of colours ensure its perfect for urban commutes, stolen hour lunchtime rides or a coffee shop mission on foot if you feel like a day off the bike.