IMPROVE REACTION TIME - This boxing reflex ball boosts your reaction speed, timing, and punching accuracy, making it an excellent training tool for boxers and MMA, muay thai, and kickboxing fighters. SNUG FIT - Our reflex ball features a fully adjustable elastic headband, providing a comfortable fit for kids and adults. Train without worrying about the headband falling or slipping off. BURN MORE CALORIES - Just using our reflex training ball for 15 minutes per day can burn off more than 200 calories, allowing you to hit your fitness and weight loss targets in less time. TRAVEL-FRIENDLY SIZE - Our reflex ball fits easily in your gym bag, backpack, or pocket, allowing you to train anytime, anywhere. It is also made of durable materials that will endure daily use.