Triple Eight Gotham Water Helmet for Wakeboarding, Neon Tangerine Matte (Large), is our low-profile Gotham design with subtle brim now in a lightweight super-comfy water helmet. Sweat saver Halo liner developed exclusively for water is super comfy constructed with three foam layers wrapped in plush fabric. Snap-in ear flaps are also available. Use a soft tape measure or string to measure circumference of head, just above eyebrows.