The Swimbait Underground X ANETIK UltraGuide blends sturdy functionality of traditional guide shirt basics with unmatched featherweight breathability of ANETIK's VINT Cooling Technology applied throughout the sleeves and hood. 5 strategically placed Secure Storage Pockets, Adjustable PrimoLite Hood, Thumbholes on Sleeves, Rustproof Snap Closures, and Maximized Back Venting for constant airflow throughout. The rules have changed, the UltraGuide is proof. SWBT UNDG Initials Hit Small Left Chest. Circle SU Left Wrist.