Santini Atom Jersey - Grey Size 4XL The super light ATOM short sleeve jersey is ideal for the hottest days. Front and back are made from lightweight Resistex‚ Bioceramic fabric, with breathable Dragon weave material sleeves and side-panel inserts. The jersey benefits from an ergonomic construction ‚œ it‚s more elongated at the back, with a silicone elastic gripper at the base of the garment helping o provide an optimal fit in the tuck position. The ATOM also features a full-length covered zipper and triple back pocket with reflective tape for better visibility.