GURU TIP:  If you are on the upper edge of your sternum size recommendation, then we recommend going up to the next size for increased chest strap adjustability options. We also recommend reading the flask cleaning instructions on the label to keep your bottles sanitary! Hand washing is also recommended to keep the product in top condition after sweating in them!

TECH TIP: If you’re looking for a smooth and reliable race vest that will keep you comfortable for your longest runs and races, then give Nathan’s 4L Pinnacle Hydration Race Vest a try! This vest comes with two 20 oz soft flasks with elongated straws for easy sipping while on the move. If you’re concerned about bringing too much on race day, this vest has more than enough pockets for all your needs. Featuring two entry pockets in front of the bottles, two small side entry pockets for smaller items, large 4L back panel for extra storage and vertical pockets for trekking poles or larger items, you will be set! The bottles are also BPA & PVC free so you don’t have to worry when you’re out under the warm sun about your water being affected by BPA!

Sternum sizing (in inches):

XS – 33″ – 35″

S – 36″ – 38″

M – 39″ – 41″

L – 42″ – 44″ 

XL – 45″ – 47″

BUY THIS want the ultimate vest for racing or longer adventures. 

DON’T BUY THIS aren’t running or hiking for more than an hour at a time! A standard handheld bottle should do the trick instead!