Wilson Promotion Isoblox Chest Protector Wilson's Promotion isoBLOX® Chest Protector comes straight at you with improved fit and mobility. The Throw-Motion Stretch Zone is made to flex in multiple directions, giving your throwing arm the greatest range of motion possible. A customizable neck pad can be easily adjusted for a more tailored fit and has space for team embroidery. Underneath are removable, Thin-Fit Shoulder Caps so you can place the protection exactly where you need it. Not to be overlooked is the isoBLOX technology. This impact protection is light, flexible, and breathable. It protects across the sternum to help deaden impact for minimal ball rebound. Two-piece construction gives the protector a contoured fit that stays in place, whether you're standing or crouching. Forward clip-in positions wrap the protection around your sides and allow you to get in and out of your gear quickly. The four-point adjustment system adds a secure fit while moving with you. Lined with Dri-Lex® moisture-management material. To determine the proper size, measure vertically from the top of the sternum to the waistline.