MARINER SUSPENSION SEATS offer the widest range of value, features and options for rough water and sport boat applications. STANDARD FEATURES * "Knee Action" mechanical suspension * Heavy duty shock absorber * 6" fore - and -aft double locking slide adjustment * Four position, 3" seat height adjustment * Backrest adjustment * Contoured lumbar support * Convenient side chart pockets * Two color vinyl (Formula III ONLY) * OPTIONAL FEATURES 11" - 13" slide mounting * Swivel action base * Seat risers (1 1/2", 3 1/4", & 4") * Fore - and - aft isolator * Suspension Skirt * Armrests (Formula 1) (COMES AS STANDARD FOR FORMULA II & FORMULA III) * 5 stock vinyl colors (Formula I & II ONLY) * 28Optional vinyl colours (Formula I & II only) * 4 Nylon fabric/vinyl colors (Formula III ONLY) * Custom upholstery upon request * Embroidered logos: Seat back, chart pocket (COMES STANDARD FOR FORMULA III) * Custom Heat seal logos (Formula I & II ONLY) * Custom embroidered logos * Custom high backrest