Nerd Belt Running belt (Zip) Select:Phone belt (zip) + race bib holder Power accuracy stays constant at

Power accuracy stays constant at an impressive +/- 1%

keeping the boys cool at all times

no stress packability

The original nerd belt

Durability and clarity are non-negotiable for serious swimmers

Nerd Belt Running belt (Zip) Select:Phone belt (zip) + race bib holder Power accuracy stays constant atThe nerd run belt is a runners go to belt for carrying phone, keys and fuel during training sessions and races. Perfect for everyday runners and endurance athletes, marathons, half marathons and training. The running belt is light weight, comfortable, holds up to 6 gels, phone and keys, plus you'll experience no bounce on your hips. Shop the nerd phone belt today.