The Zandstra Olso Speed Skate has the following features: This Zandstra speed skate is a great, adjustable model for juniors and it has a semi-soft boot. This boot is adjustable into four different sizes for years of skating fun. The boot fastens with three Velcro straps for easy on and off. The aluminum tube is black anodized and has a super Low Speed Skate with High Carbon Springsteel (58Rc) blade (radius 27m). Specifications: Zandstra speed skate for juniors Adjustable into four different sizes Semi-soft boot Fastens with three Velcro straps Blade: Low Speed Skate with High Carbon Springsteel (58Rc) Tags: skates, speed skates, ice skates.