Can a 600 ml soft flask fit in each of the soft flask pockets?

Depends on the shape. A rather thin bottle works great. I carry two 22 oz bottles of Smart Water easily.

will it fit a male 44 inch chest size ?

I am not sure of my chest size but I am a 6’2” 280 pd man and it fits barely.

Does it include the water bladder? Or Bottle?

honestly can't remember, but I don't think so because I purchased the 500 ml bottles and full they're a too big to fit in the pouch. I should have gotten the 250. I am happy with the vest. I did also get the back bladder which I don't like for running cuz you have to suck the fluid which is tough on the breathing.

Is this washable? Preferably washing machine compatible?

Yes. I wash mine on a short gentle cycle with luke warm water and hang dry inside house.

Running Hydration Pack 5.5L Backpack Bladder for Hiking Cycling Running Race

Product ID: 378732849

Details

Brand
AONIJIE
Colour
Gray
Material
Polyester
Sport
Camping &
Product Dimensions
39W x 41H

🎽6 multi-functional storage pockets

💧2L hydration bladder compatible

⚖️Ultra-light 250g pack weight

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HK$968

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
AONIJIE
Colour
Gray
Material
Polyester

Description

💨 Run Light, Hydrate Right, Conquer More!

CUSTOM FIT COMFORT - Adjustable shoulder, chest, and waist straps with breathable mesh ensure zero bounce and max airflow.
HYDRATE LIKE A PRO - Compatible with a 2L bladder plus dual 250ml bottles for seamless hydration on the move.
FEATHERWEIGHT FREEDOM - At just 8.82oz, this pack feels like a second skin, letting you run unburdened and fast.
ORGANIZE YOUR ESSENTIALS - Six strategically placed pockets keep your gear secure and accessible without the bulk.
VERSATILE ADVENTURE READY - Designed for running, hiking, cycling, and marathons—your all-in-one outdoor hydration solution.

The AONIJIE Running Hydration Pack is a super lightweight 5.5L vest designed for middle to long-distance runners and outdoor enthusiasts. Weighing only 250g, it features a 2L bladder-compatible hydration system, six external pockets for organized storage, and fully adjustable straps with breathable mesh for a secure, comfortable fit. Perfect for running, cycling, hiking, and marathons, it keeps you hydrated and agile on every adventure.

Specifications

Strap Type	Adjustable, Shoulder Strap, Waist Strap
Capacity	5.5 litres
Pocket Description	Stash Pocket
Number Of Pockets	6
Tank Volume	2 Litres
Manufacturer	AONIJIE
UPC	631517897557
Country of Origin	USA
ASIN	B07QQYFL7L

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