Roller Derby have updated the popular Viper to the M-4. This new Retro style low cut skate is ideal for beginner & intermediate skaters of all ages. The Viper Speed RTX Frame with Action Control System ensures you experience the maximum control for this new skate. This boot is also a preferred skate for the Roller Derby Sport. Features: - Deluxe Speed Profile Boot with Comfort Padding and Reinforced Support - Full Lace System Closure with Velcro Power Strap - RTX Pro Series Frame - 58mm x 40mm MAG Core Urethane Wheels -Abec 5 Bearings FIT - We recommend you order your normal shoe. Special Offer Buy skates, any helmet and any 3 pack of protection (wrist, elbow, knee pads) and we will deduct £10 when we process your order. (the £10 will be deducted when we charge your card but not at the checkout)