IO Waist Pack Running Belt

Built for runners who want to carry the essentials and nothing else, the IO Waist Pack is our pick for short training runs and low-key race days. The Max O2 attachment system and stretch mesh construction move with you without bounce or binding, while multiple reflective details keep you visible on early morning and evening miles.

• Stretch mesh belt and pocket expand to swallow gels, cards, keys, and a phone — more capacity than the slim profile suggests
• Max O2 Waist attachment system provides extra recoil so the pack moves with your hips instead of fighting them
• Soft-touch perimeter edging sits against the body without chafing, even on longer efforts
• Multiple reflective details make it a solid choice for pre-dawn or after-dark runs when visibility matters
• Available in Small, Medium, and Large to dial in fit from a 22" to 41" waist — unisex sizing works for any runner