About this item 2-in-1 Hybrid Kettlebell System: The super-versatile FITT Bell can be used as two individual kettlebells or combined together into a hybrid barbell for incredible workout versatility. Fully adjustable: Each FITT Bell can be filled with up to 8kg (8L) of water, perfect for virtually any fitness level. Simply fill it to the level thatҳ right for you ֠1 litre of water weighs 1kg, itҳ that simple. As you progress, use more water to keep improving. Dynamic Fluid Resistance Training: The constant movement of the water acts as a ѬiveҠweight, adding instability to your workout so every rep is different. This helps increase core activation, strengthening your abs and obliques, and improving overall core stability. Total body workout: Target every muscle in your body with a whole range of exercises to work your arms, shoulders, chest, back, abs, glutes, hamstrings, quads and calves. YouҬl even get your heart pumping and those calories burning in just minutes a day! Ingenious space-saving design: FITT Bell replaces up to 8 different kettlebells, all in one, compact and fully deflatable package. And, when empty, itҳ lightweight and easy to transport for workouts on the go! Gym quality construction: Made with durable, extra-thick PVC, FITT Bell is built to stand up to high-intensity workouts and is perfect for using indoors or out.