I bought 2 childrens life jackets and an adult one for myself and they are worth their weight in gold. I used them in the sea for the three of us for use with our dinghy. Within the first hour of being in the sea my 6 year old daughter toppled out of the dinghy as a wave broke. Whilst we weren't out far at all the life jacket helped her until I got to her. Once she realised she could swim with the life jacket on it was hard to reign her in!! These jackets gave me the confidence to go further out with the jackets on, even for myself who can swim well enough in the sea! I would say these are invaluable for children and adults alike when going out in the water. They fit great, are adjustable, very comfortable and do not hinder your movement in any way. These were also delivered very quickly from the company - all in all a great buy and money very well spent.