Best in 7 days
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Ships within 48 hours · Estimated delivery Sep 25 - Sep 30
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For Your Every Summer RSVP, with Code: SUMMER15
Description
Square Root Of 1600: 40 Years Old - Birthday Gift T-ShirtSolid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 50% Cotton, 50% Polyester Imported Machine wash cold with like colors, dry low heat This funny and nerdy tee is the perfect comical geek present gift idea for B day for everyone celebrating to become 40 yrs old. It could also be a nice group shirt for a 40th B day party. This graphic Tshirt is a great geeky math joke for every nerd or a mathematic, algebra, physics
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.2 ★★★★★
Based on 2282 reviews
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Product Reviews
★★★★★ 3
Odd shape
Size: One Size, Color: Prairie Tan
Odd shape
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Reviewed in the United States on January 19, 2026
★★★★★ 5
Producto acorde a lo especificado
Size: One Size, Color: White/Silver
La visera es sobria y le gustó mucho a mi esposa.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 17, 2025
★★★★★ 5
Perfect Visor
Size: One Size, Color: (001) Black / Black / Reflective
I bought this thinking I wouldn’t like it. I was so wrong. This is lightweight and the perfect fit. What a great value. It’s so comfortable on your head and the vent on it was a great idea. Adjusts easily and just a great buy.
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Reviewed in the United States on July 27, 2024
★★★★★ 5
A great sport visor
Size: One Size, Color: (100) White / White / Reflective
My head is small so a lot of visors don’t fit because of the Velcro. This is perfect and the ability to wet it for coolness is great. Love it for tennis.
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Reviewed in the United States on August 14, 2025
★★★★★ 5
Great for running
Size: One Size, Color: (001) Black / Black / Reflective
Hat fits well and worked great for my marathon. The Velcro doesn’t pull on my hair.
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Reviewed in the United States on November 24, 2025
