Sides and underarms sections in 4ways stretch nylon and polyester fabric

which is particularly useful in warm temperatures to maintain comfortable temperature regulation

the comfortably well-ventilated back panel fits securely even on challenging terrain

Developed with an anatomically shaped shell and liner

walks in the woods and excursions with a fully loaded backpack

oakley flak xs polished white prizm deep water polarized 0oj9005 06 7840006112645 Size:ONE SIZE Sides and underarms sections inOakley Flak Xs Polished White W Prizm Deep Water Polarized. Specially engineered for youth faces, Flak XS features the same innovations that athletes have grown to expect from the Flak family. FEATURES Lightweight O Matter frame material with ellipse metal icon accents Unobtainium earsocks and nosepads for increased comfort and performance Polarized and Iridium lens options available Interchangeable lens system Available with Oakley Authentic