Lightweight performance jerseythis high performance jersey has all the features for day long comfort when riding off road the lightweight windproof front keeps the chill of on fast swooping downhills while a rapid wick yet durable back panel allows for optimal breathability under a hydration pack so you don39t sweat up and overheat underarm mesh panels help damp moist air escape while a full length zip gives the option to fully ventilate on long tough climbs mtr ultimate racing performa