Hayabusa Men’s Core Short Sleeve Rash Guard GreenCore Short Sleeve Rash Guard The Core Short Sleeve Rash Guard delivers a second skin fit that flows with every movement. Built from resilient high tensile fabric with a silicone lined waistband to keep everything locked in place through every scramble. Lightweight, sweat wicking, and quick drying, it keeps you cool, focused, and ready to push beyond. Designed for those who demand more the Core Rash Guard is built to move with you and elevate every