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Sleepy Peach

The Great Atomic Tomorrow Knit Button Up

The Great Atomic Tomorrow Knit Button Up

Regular price $89.61
Regular price Sale price $89.61
Sale Unavailable
This item is true-to-fit. Please use our sizing guide and order one size larger if you are unsure.

Kiss your 2.5 children goodbye and dedicate your life to the future of technology! Inspired by the 1950s atomic movement, this unique and eye-catching knit button up features a custom atomic pattern in bold, vibrant colors.

  • Short sleeve 100% cotton button up
  • True-to-fit sizing
  • Lightweight cotton (slightly thicker than a polo shirt)
  • Custom 1950's midcentury scheme
  • Custom "Sleepy Peach" tag on collar
  • Functional pocket

Eric is 5'6" and wearing the small size.

More details can be found in our Shipping & Returns section.


Free shipping on all orders. If something doesn't fit, we will exchange your order with your requested size for free within the first 30 days of your order delivery.


As a general rule, $20-30 shipping. Your total will be automatically calculated during checkout. If something doesn't fit, we will exchange your order with your requested size for free within the first 30 days of your order delivery.


Gift cards are delivered by email and contain instructions to redeem them at checkout. Gift cards are not eligible for refunds.

Size Chest Length
XS 20.2" 26.3"
Small 21.2" 27.1"
Medium 22.0" 27.9"
Large 22.8" 28.7"
XL 23.6" 29.5"
2XL 24.4" 30.3"
3XL 25.2" 31.1"
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Customer Reviews

Based on 6 reviews
Joshua Willis
Matches my hair!

I cannot decide if this one or the Muted Goldfish Knit Button Up are my favorite shirts that I own... luckily I can rotate between them! Great quality, fits perfect, even after washing multiple times.

Your hair is AWESOME! Thanks for the kind words.

This shirt slaps!

This is a sharp looking shirt! Every time I wear it, I get loads of compliments! It's well-made, just like all of the clothing made by this company. I'm totally hooked on Sleepy Peach 🍑💚

For legal purposes I must state that this shirt does not *actually* slap. Thanks for the kind words!

B. Newms
Instant Classic

Well made shirt on all levels. Feels great, many compliments on the colors and style. Just a comfortable fun shirt.
Love it. More please Sleepy Peach!

Lee Hansen
Great top! Heads up if you have boobs.

Love the fit and comfort on this top. Ordered a slightly larger size than my actual measurements means it fits pretty well over my chest. Heads up though- the spacing between the buttons is wide and between the 3rd and 4th buttons there can be some gapping over the chest. Be sure to check the measurement chart and go for the larger size if possible.

Fallout vibes

I got this one and the Muted Goldfish Knit Button Up. Both of the new button ups are great and feel good!