UNION JACK FLASH (OG'S) 12mm The built-in whistle is designed

The built-in whistle is designed to easily alert other runners if you are in distress or to scare off critters in the night

Weight with Bladder: 9

Enhances performance

This metric even accounts for changes in performance that could be caused by heat or altitude

UNION JACK FLASH (OG'S) 12mm The built-in whistle is designedLIMITED EDITION: ROLLING STONES HOT LIPS Classic shape with new levels of style and performance. We designed these shades to look good and fit comfortably on your face whether you're racing Jumpin' Jack Flash or running through a classic British downpour. INTRODUCING UNION JACK FLASH. Jumpin Jack Flash was inspired by Keith Richards gardener, Jack, who woke Mick up by stomping in rubber boots outside the window. So, we encourage all of you to put on