Save money and get a package in the mail every month with our Smart One 4.0 Subscription. With this subscription we will send a Smart One 4.0 Diaper every month. This is a great way to build your stash over time while receiving a discounted price. A minimum of 2 months, which includes the initial order, is required for all subscriptions. Subscriptions can be cancelled after 2 months without additional charges.

Print/color is predetermined each month. Substitutions, exchanges, requests can not be accepted for subscriptions. 

One Size | 10–35 lbs | 100% Certified Organic Cotton

The Smart One 4.0 is a premium organic cotton all-in-one cloth diaper designed for simplicity, absorbency, and long-term durability. This one-size reusable diaper fits most babies from 10 to 35 pounds and provides reliable leak protection without unnecessary bulk.

With ten absorbent layers of certified organic cotton and an attached insert that folds for customized absorbency, the Smart One 4.0 delivers performance and convenience in one streamlined design.

Why Parents Choose the Smart One 4.0

100% Certified Organic Cotton Interior

The diaper is lined with certified organic cotton, providing a natural fiber layer against baby’s skin. No synthetic stay-dry materials are used inside the diaper.

Ten Layers of Absorbency

Built with ten super absorbent layers, this all-in-one diaper is designed to handle everyday wear while maintaining a trim fit.

Customizable Absorbency

The attached insert can be folded to concentrate absorbency exactly where your baby needs it most, making it suitable for both light and heavier wetters.

True All-in-One Convenience

Everything is sewn in. No stuffing, snapping, or assembling required. Diaper changes are quick and straightforward, making this an ideal option for caregivers, daycare, or cloth diaper beginners.

Faster Dry Time

The unique design allows for efficient washing and drying. Most machines will fully dry the diaper in one warm cycle.

Gentle, Leak-Reducing Fit

Wide, rolled leg elastic helps:

• Reduce red marks

• Improve comfort

• Prevent leaks

Materials

Inner: 100% Certified Organic Cotton
Outer: 100% TPU (waterproof and breathable)

Care Instructions

1. Wash 1–2 times before first use to prep the fibers.

2. Absorbency will continue to increase with regular washing and drying.

3. Wash warm.

4. Dry warm.

5. Do not use bleach or fabric softener.

Key Benefits of the Smart One 4.0

• Organic cotton cloth diaper

• One-size all-in-one diaper

• Reusable cloth diaper 10–35 lbs

• Ten layers of absorbency

• Trim, low-bulk design

• Quick-dry cloth diaper

• Easy cloth diaper for beginners

• Natural fiber diaper without synthetic lining