Castelli criterium jersey fzthe criterium jersey is the warmest thermal jersey in the castelli collection the thick and fleecy warmer fabric provides a lot of insulation yet delivers great moisture management with good stretch for a perfect fit added reflective stripe will give you extra protection on those shorter winter days features warmer fabric is our warmest non windproof thermal fabric reflective insert at upper chest and back embossed logo 3 external rear pockets full length ykk caml