Olly has been doing swimming lessons since he was 11 weeks and he is so confident in the water. Obvs he cannot swim yet, kicks and does tiger arms but it will be a while yet. He has just moved into the bigger class where the other kids are between 2-3 and they wear swimming disks. He hated them at first but saw the other kids wearing them and wanted a go and loves them so I bought our own. They are called 'Delphin Swim Disks) you get 3 disks for each arm and the arm hole is elasticated so can be used upto 12 years of age. They arnt cheap , £24 from amazon but I was looking at a jacket for holiday in May and they were £30 and will only fit him for this year. The disks are great, they keep buoyancy upright so if they fall backwards for forwards into the water he will always float to a standing position. All the kids swimming classes use them as they are the best. The jackets will keep them afloat but if they fall forwards into the water it wont bring them back upto standing position and they could potentially drown.
Hope you find this helpful
cc