Mtb insulationby combining an insulated body that wicks well plus windproof sleeves endura achieve the perfect balance of warmth and protection for mtb riders heading out in cooler weather mesh underarm panels allow warm moist air to escape so minimising any clamminess as you might feel as you warm up the rear pockets are positioned for ease of access as well as allowing the use of a backpack another example of endura39s legendary attention to riding details that make all the difference w