Task Seating, Guest Seating Classic styling and advanced ergonomic features make Teton perfect for the demands of today's office. Ratchet-Back Height Adjustment.Waterfall-Front Seat Edge. Applications: General office staff, computer users, reception, guest seating. Options: The special Teton McKinley (SETE252).Mechanisms include seat-height, chair tilt that locks in any position, and back tilt that locks the back alone in any position. Construction: Sierra chairs are constructed with heavy-duty 7-ply plywood bottoms, 5-ply backs, all padded with comfortable urethane foam.Upholstered fabrics are treated with Stain Guard to resist office spills. Price Range: $