Reusable Swim Diapers only $8.99+ Free Shipping
Amazon has these FINIS Girl's Swim Diapers and FINIS Boy's Swim Diapers on sale today for only $8.99. These are eligible for Free Super Saver shipping on orders over $25, or get free shipping on any size order with AmazonPrime membership.
If you are planning to spend any time in the water, using reusable swim diapers is very cost-effective. I bought one size medium swim diaper 3 years ago and it fit my son from about 6 months to potty training, and I never had to buy a box of disposable swim diapers!