ACE 16.1 has a knit material on the forefoot which ensures that the upper part is extremely flexible and will always move with the foot for a tight and sock-like fit. Central foot and the heel region of the shoe is made of a synthetic material, which provides stability around the ankle and protection against stroke. Meanwhile, inside the heel padded, giving additional protection and a soft and comfortable fit that adjusts to your heel. The tip of the shoe is reinforced with a thin layer of rubber, which increases wear resistance and durability.