Take your VKs to the next level. The VK Boost is our proprietary technology in a booster strap designed to maximize energy return (estimated +25% more), improve athletic efficiency and reinforce ankle stability. Up your game with the VK Boost! Comes as a pair and available in two sizes:

• Medium (Men's Size 9/Women's Size 10.5 and below)
• Large (Men's Size 10/Women's size 11.5 and above)