Nathan Marathon Pak 3.0 Color:Vapor Grey-Sailor Blue Altra evolved the rubber midsole

Altra evolved the rubber midsole for a lighter weight and more flexibility so you can feel connected to the road

Deeper flex grooves for increased traction & longevity

soft mesh fabric allows airflow and a form that fits your head

is used to provide gentle compression and a plastic loop is utilized to make it easier to adjust

A raised rim cradles your foot in the footbed for uniquely soft stability

Nathan Marathon Pak 3.0 Color:Vapor Grey-Sailor Blue Altra evolved the rubber midsoleWith a versatile design that can be worn over the shoulder, the light and versatile Nathan Marathon Pak 3. 0 Belt combines storage and comfort to keep you fueled on the run. Carry your smartphone and other essentials in the large zippered pocket. Details: Contoured, minimalist waist pack can also be worn crossbody. Soft and durable materials dry quickly with interior breathable air mesh. Chafe free seams Race ready features include elastic gel loops,