Thanks to Oakley® R&D, the fit of Marshal XS has been designed specifically to ensure a properly centered frame and lens fit on a youth face. • Bringing the proven benefits of our adult fram es to a youth fit • Adult inspired Marshal design with proper face geometry, resized for an ultimate youth fit, target 8-13 year old • Maintain strong fit story through proper DBL/eye size/temple length • Pinned Cam Hinge • Durability and all-day comfort of lightweight O-Matter™frame material • Wire core temples for adjustability • No-slip Unobtainium® earsocks:Increase grip with perspiration • Three-Point Fit: Comfort and performance that holds lenses in precise optical alignment • Available in two sizes 47/49 • Protective carrying case included • Available with Oakley Authentic Prescription Lenses