Hydrogym Power Bag Adjustable 1-28Kg Water Weight Home/Gym Full-Body Workout

These item have a small misprint where it says 4/8kg instead of 14/28 kg - see third picture
Company price for these misprints are £47 - see screenshot

Helios Hydro Gym
You choose the weight you need. 1 -28kg This is a dynamic piece of equipment with an unstable center of gravity designed to test every muscle in your body. 10kg of water in the Helios will feel a lot heavier than a 10kg dead weight at your gym. Every exercise you do will engage your core and hit muscles you didn't know you had.