Nike Run Race Day 13L Backpack Get geared up for your next run with the Run Race Day Backpack. Utilising a lightweight polyester fabrication, the Run Race Day Backpack is a durable companion for all your running needs. It has a slim profile for style and comfort, without restricting the space in the bag. The main compartment with dual-zip closure allows you to store your items safely, and mesh pockets at the sides allow you to carry a water bottle comfortably along with any other essentials you want to grab on the go. The backpack has been constructed using a breathable mesh back panel, providing you with comfort on the back and optimising the airflow in a high-heat area. To hold the garment with comfort and keep it stable on your back, the bag has adjustable mesh shoulder straps with a webbing sternum belt, providing you with a preferable feel, for the best possible fit. For added style, the bag has an allover print.