The Bont semi race is a half high shoe. This provides more support around the ankle. The model has been a household name for many years. The shoe is thermoplastically deformable around the ankle area.
The V4 is made from a single piece of durable and lightweight aluminum. In the early 1990s (before the clap skate), Falco Zandstra became World Champion on a similar Raps product (the flyer). The hardness (the harder, the less often you need to sharpen) is 60 HrC. In terms of quality, weight and hardness, there is no comparable skate blade on the market.