Baseball Flip-up Sunglasses Used by Outfielders & Infielders from Little League to Adult Softball (One Size Fits Most, Adjustable Strap) Baseball Flip-up Sunglasses Used by Youth Players in Travel Ball and Little League to Adult Softball & Baseball Players in High School and College. Polycarbonate constructions for maximum protection. Used by Outfielders & Infielders to help with pop-ups and fly balls in the sun by flipping the lenses down. Coated lenses meet ANSI Z80 3 standard for effective UV ray protection. One Size Fits Most with Adjustable Headstrap