Katie Kimmel x Earth Day Kids “Happy Earth Day” (White)

The overalls Earth — red hat, yellow dog, sunflower companion, little chicken — on a natural kids tee. “Happy Earth Day” in hand-written script. The most charming piece in the collection, now in a size that fits the most enthusiastic audience for it.

Official Earth Day 2026 product. In support of EarthDay.org. Limited edition.

Earth Day Official Product – Authorized by EARTHDAY.ORG

5-9 Day Shipping

Proceeds go to EARTHDAY.ORG

Sustainable & Fit Details

• 100% organic combed ring-spun cotton• Fabric weight: 5.3 oz./yd.² (180 g/m²)

• Each shirt is made one by one to minimize waste.

• The sizes correspond to a smaller size in the US market, so US customers should order a size up.

• The fabric of this product holds certifications for its organic cotton content under GOTS (Global Organic Textile Standard) and OCS (Organic Content Standard)


Your Purchase Helps the Planet

Proceeds from your purchase will go to the nonprofit EARTHDAY.ORG. Founded in 1970, we are the global coordinator of Earth Day and a nonprofit organization dedicated to promoting environmental education, conservation, and action. With a network that reaches over 1 billion people in more than 190 countries, EARTHDAY.ORG plays a key role in mobilizing individuals, communities, and governments to protect our planet.

Size guide