Montbell Tachyon Men's Parka Jacket - Hot RedWitness the slickness, the Tachyon Parka has the glossiest sheen and is about as lightweight a shell as youre likely to come across. Produced in an extremely thin but resilient Ballistic ripstop nylon, its a stripped back piece for the trails that makes a perfect layer to cut out chilly winds whilst being breathable. Packs down really small so you can keep it close to hand and offers water repellency in light rain.