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Semaphore Hat - Funny Developer Humor Cap - Geek Gift for Programmers and CS Nerds

Sale price$21.95
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A nod to the synchronization primitive that holds multithreaded systems together — and the programmers who understand why that matters. The Semaphore Hat is a subtle, brilliantly nerdy developer humor cap that separates the CS graduates from the rest of the crowd at a glance.

Perfect for computer science students, backend engineers, systems programmers, and anyone who's ever debugged a deadlock at 2am. Adjustable fit, bold design, instant credibility among anyone who gets it.

  • Funny CS and developer humor hat — niche enough to be exclusive
  • Great gift for computer science students, backend devs, and OS enthusiasts
  • Adjustable fit — one size works for most
  • Printed on demand by Geekpsters, ships worldwide

Makes a perfect computer science gift, programmer birthday present, or "you finally passed your OS course" celebration hat. Will confuse exactly the right number of people.

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↩️ 60-day hassle-free returns
🚚 Printed & shipped in 2-5 business days
🇧🇸 Proudly printed in the USA or EU

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We think you'll adore your products! If you are not completely satisfied with your purchase, you can return or exchange it within 60 days.

You can find all of the information about our return policy here. Any more questions? Just contact us—our customer service team is happy to assist!

Size Chart

Measurement XS S M L XL 2XL 3XL 4XL 5XL
Width, in 16.50 18.00 20.00 22.00 24.00 26.00 28.00 30.00 32.00
Length, in 27.00 28.00 29.00 30.00 31.00 32.00 33.00 34.00 35.00
Sleeve length, in 8.60 8.90 9.20 9.50 9.70 10.00 10.40 10.80 11.20
Size tolerance, in 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50