The Utmost Province® Carlos Sainz-inspired shirt features a regular fit and offers a soft, smooth, and durable feel due to its extra-long fibers. Refer to our SUPIMA® cotton t-shirt size chart to find the perfect fit.

The Utmost Province® Carlos Sainz F1 t-shirt is handmade using an Original Favorites SUPIMA® cotton t-shirt, made from 100% American Grown SUPIMA® cotton.

SUPIMA® cotton is a premium, American-grown cotton that features extra-long staple fibers. It represents 1% of the world’s cotton and is known for its superior softness, strength, and vibrant color retention.

• The official SUPIMA® hangtag on the Original Favorites SUPIMA® cotton tees signifies that they are 100% pure American Pima cotton.
• This is verified through forensic science that traces the fiber's origin, ensuring it is 100% American-grown Pima and not blended with inferior cotton.
• SUPIMA® also partners with Oritain, a forensic science company, to help verify cotton origin and strengthen supply-chain traceability.

Learn more about SUPIMA® cotton on the official SUPIMA® site.

Yes. Utmost Province® sources its SUPIMA cotton t-shirts used to make this Carlos Sainz-inspired t-shirt directly from their certified supplier, Original Favorites.

• Original Favorites produces its SUPIMA® cotton t-shirts in a windmill-powered, Fair Trade Certified™ facility.
• The products they produce are grown, harvested, crafted, and traded in ways that improve lives and protect the environment.

No. The Utmost Province® Carlos Sainz T-Shirt is an independently designed, Williams Racing–inspired piece created by our custom apparel team.

• We are not affiliated or sponsored by Formula 1, any F1 teams, or drivers.

Utmost Province® is a family-owned brand that offers a premium alternative to official F1 merchandise. Each piece is handmade and features original artwork by our graphic design team.