Adjustable backrest for dependable support Ergonomically shaped seat with an adjustable backrest reduces lower-back strain and improves posture during rides. The backrest can be positioned for comfort on short trips or longer journeys. Breathable, comfortable design The seat surface features a breathable hole pattern to promote air circulation so you stay cooler and more comfortable on extended rides. Soft foam padding provides cushioning while maintaining shape. Stable, shock-absorbing construction Built-in shock-absorbing foam and a shockproof structure smooth out bumps and vibrations for a more stable ride. The design enhances grip and support so you feel secure on varied road surfaces. Durable, easy-care materials Tear-resistant components and waterproof synthetic leather resist wear and are simple to wipe clean. Materials are selected for long service life and to resist deformation under regular use. Quick, broadly compatible installation Fast to install and time-saving to set up. Compatible with both double rails and clamping code seat tubes. Designed to maintain shape and performance over time. Key attributes Function: Adjustable backrest with ergonomic seating and shock absorption for comfort and support. Compatibility: Fits seats that use double rails or clamping code seat tubes. Materials: Shock-absorbing foam, tear-resistant components, waterproof synthetic leather. Performance: Breathable design, reliable load capacity, shockproof construction, long service life. Maintenance: Easy to clean surfaces. Practical use scenarios Daily commuting: Add back support and shock absorption to reduce fatigue on urban commutes and mixed-surface routes. Long leisure rides and touring: Improve comfort and airflow on longer trips where posture and cushioning matter. Recovery or casual rides: Suitable for riders who prefer added lumbar support for relaxed, low-intensity cycling. What this delivers Reduced back fatigue and improved riding posture More comfortable rides through shock absorption and soft padding Durable, low-maintenance construction for long-term use Fast installation and wide compatibility so you can upgrade most bike seats quickly This seat combines an adjustable backrest, breathable design, shock-absorbing foam, and durable, waterproof materials to provide dependable comfort and stability for everyday cycling and longer rides.