The perfect rain coat from Petit Bateau.
It sells from £63 new: https://www.petit-bateau.co.uk/e-shop/product/23954/O68/iconic-babies-raincoat.html
This is a bargain price!
It has a zip & velcro closure at the front, is fully lined in soft striped jersey and has a detachable hood.
The label says from 6 months - we say this is accurate and would happily fit up to most 18 month olds.... even petite 2 year olds. It's fully machine washable.
In immaculate condition.