I Know What The Fuck I’m Doing Shirt

If you know what the fuck you’re doing, then this shirt is for you! This shirt is perfect for those who know what they’re doing and want to let the world know. With this shirt, you’ll be able to show off your confidence and let everyone know that you know exactly what you’re doing. This shirt is made of high quality materials and is sure to last, so you can wear it over and over again. Order yours today and let the world know that you know what the fuck you’re doing!

It was designed and Printed in the USA! Available in many styles, colors, and sizes. This could be a cute gift. This t-shirt is made of quality cotton, which makes it very comfortable to wear. Now it is available in t-shirts, hoodies, long sleeves, and tank tops. If you need the shirt in other styles, please contact us.

Shipping Information

• This product will be printed and shipped from the USA.
• We will ship out after 1-3 business days + (3 -7 business days) to arrive at your front door. The International Orders will take longer, it might take 7-14 days to arrive.
• USA Orders: The shipping cost for the first item is $5.99, plus $2 for each additional item.
• International Orders: The shipping cost for the first item is $8.99, plus $2.5 for each additional item.

I Know What The Fuck I’m Doing Shirt Product Details

Material:

• Classic T-Shirt:
  • 5.3-ounce, 100% cotton (99/1 cotton/poly (Ash) & 90/10 cotton/poly (Sport Grey)
  • Heavyweight classic unisex tee
  • Taped neck and shoulders; Tearaway label
  • Made with sustainably & fairly grown USA cotton
• Women's T-shirt:
  • 100% preshrunk cotton; Ash Grey 99% cotton, 1% polyester. 
  • Sport Grey is 90% cotton & 10% polyester; Dark Heather & Graphite Heather are 50% cotton & 50% polyester.
  • Feminine 1/2 inch rib mid-scoop neck; side-seamed with slightly tapered Missy fit
  • Double-needle stitching throughout; seamless rib at neck
• Unisex Sweatshirt:
  • 8 oz; 50% cotton, 50% polyester
  • Air jet yarn for a softer feel & no pilling
  • 1×1 athletic rib cuffs & waistband with spandex; Double-needle stitching
  • Care: Machine wash cold; Tumble dry low
• Unisex Hoodie:
  • 8 oz; 50% cotton, 50% polyester
  • Air jet yarn creates a smooth, low-pill surface
  • Double needle stitching; Pouch pocket; Unisex sizing
  • Care: Machine wash cold; Tumble dry low
• Unisex Long Sleeve Tee:
  • 6 oz., 100% USA cotton
  • Taped shoulder-to-shoulder, Double-needle stitching throughout, ribbed cuffs
  • We suggest ordering one or two sizes up for a fuller fit; Please refer to size chart for actual garment measurements
  • Made with sustainably and fairly grown USA cotton
• Women V-Neck T-Shirt: 
  • 5.3 oz, 100% cotton preshrunk jersey knit, Sport Grey 90% cotton/10% polyester
  • 1/2 inch mitered v-neck collar
  • Taped neck and shoulders with cap sleeves
• Racerback Tank:
  • 4 oz, 60% combed ring-spun cotton/40% polyester jersey; 30 singles
  • Self-fabric binding on neck and armholes
  • Fabric laundered for reduced shrinkage
  • Fitted Style; We suggest sizing up
• Women's Polo:
  • 3.8-ounce, 100% polyester tricot
  • Moisture-wicking & snag-resistant
  • Curved back waist seam for a flattering fit
  • Taped neck; Self-fabric collar; Side vents
• Men's Polo:
  • 6oz; 50% Pre-Shrunk Cotton; 50% Polyester
  • Dryblend fabric wicks moisture away from the body
  • Welt knit collar & cuffs; Double-needle stitched hemmed bottom
  • 3 button placket with wood tone buttons
• Men's Tank Top:
  • 6-ounce, 100% US cotton
  • Banded neck and armholes; Double-needle hem
  • Ash Grey is 99% cotton, 1% polyester
  • Sport Grey is 90% cotton, 10% polyester

* The color could be slightly different between on the screen and in practice.

Care instructions

Machine wash: warm (max 40C or 105F); Non-chlorine: bleach as needed; Tumble dry: medium; Do not iron; Do not dry-clean.

Size guide

To find the size that fits you best please check our size chart carefully! You can find the size chart at the selection form.

Some of the I Know What The Fuck I’m Doing Shirt photos