Graf Supra 735-Junior Size 4, Width Regular Ready-to-Fit Footbed - With SIDAS Technology. It aids in responsive push off and improved heel lock. Thermolam Construction - Allows heat molding of boot for ultra precise fit. AirNet Lining - EvaFIT system that draws moisture from the foot, minimizes absorption and improves drying time. Anatomical Ankle Padding - Maximizes foot comfort and heel lock. GRILAMID Toe Cap - Provides extra durability and protection.