Are swim diapers really helpful? any recommendations?

Charlie banana swim diapers are awesome. Look out for the promotion at the fairs. Buy 1 free 1 at $19.90. Otherwise try Huggies - you can get a free sample from their website. https://www.huggies.com.sg/huggies-products/huggies-little-swimmers.aspx Carousell or preloved baby goods group also sells second hand baby swim diapers - from as cheap as $5..