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In the past, Amazon Prime Day was my chance to stock up on everyday essentials; think diapers, wipes, and cute new clothes for my ever-growing girls. But this year, the most sought-after Prime Day deals are on summer must-haves. Not only are these discounts legitimately good (we are talking up to 20% off items that rarely go on sale), but these are the hot-weather staples parents truly cannot live without.

A quick heads-up from one mom friend to another: I have already seen some of the most popular items go from selling fast to completely out of stock, and we are not even 24 hours into Prime Day!

Whether you're trying to find a bump-friendly swimsuit or preparing for baby's first beach trip, now is the perfect time to score big savings. From pregnancy-safe sunscreen to clever cool-down tools, these are the Prime Day deals worth adding to your cart. 

12 Top-Selling Summer Prime Day Baby Deals

1. Up to 40% off Stanley coolers and tumblers

2. 40% off ThinkBaby Sunscreen ($9.29, was $15.49)

3. 40% off cooling towels ($10.27, was $17)

4. 31% off Charmo bump-friendly swimsuits ($26.21, was $38)

5. 30% off Mustela baby-safe Micellar Water ($13.65, was $19.50)

6. 29% off SPF sunhats ($12.82, was $18)

7. 24% off stroller fans ($15.19, was $20)

8. 24% off loose, bump-friendly sets ($31.34, was $41)

9. 20% off NatPat Mosquito Patch Stickers ($11.88, was $14.90)

10. 20% off rarely-on-sale Babiators ($24, was $30)

11. 20% off Solar Buddies sunscreen applicator ($12.78, was $15.98)

12. 20% off rarely-on-sale Supergoop! Mineral Mattescreen ($19.20, was $24)