Nathan 18oz Insulated Soft Flask Accessories Size Chart:

Size Chart:

With their bi-elastic fabric

• Zone construction features Speed Mesh side panels for enhanced breathability• Front zip for ventilation and innovative armhole binding construction for maximum comfort• Two easy-access rear pockets and dropped back hem for enhanced coverage

as well as replenishing electrolytes lost during effort

Nathan 18oz Insulated Soft Flask Accessories Size Chart:This soft flask provides big time insulation for a big time thirst. Insulated properties keep fluids cooler 38% longer than non insulated soft flasks Bite valve keeps liquid from escaping Works great with all NATHAN hydration vests Specs Capacity: 18 oz 535 mL