This Ultimate Direction Signature Series race vest is a powerhouse. It’s been through 4 ultra marathons and packs so much with such a great fit! 2 deep pockets at the front, also has 2 pockets for water flasks 500ml (included), 2 deep pockets in the back with a bladder holder in the main flap (bladder not included). Built in whistle on the left corner top pocket. She’s a gem, the only reason I’m sharing her is because I had to get a bigger vest for a multi-day ultra. But if you are dipping your toe in running or already into it and need a solid race vest, this is your girl! She hugs in all the right places too because she’s adjustable!