The original nerd belt, the NB400 is light weight and comfortable, holds your race bib, 2 x 200ml bottles and won’t bounce, regardless of your pace! Perfect for long runs, marathons and Ironman. The nerd belt is your new hands-free way to carry fluids and nutrition during racing or training for a faster performance and recovery. Make sure the belt strap sits on your hips for zero bounce. Belt Size: • Stretchy, comfortable, adjustable strap • Hip measurements 71 – 110cm hips or 28 – 45 in Pouch Size: • H: 11cm • L: 19cm • Fits all phones • Holds race number • Holds up to 6 energy gels or 4 gels, a phone, keys and more Belt is handwash only