Diagnose Don't Guess
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Diagnose it. Don’t guess.
Throwing parts at a problem gets expensive fast. The real fix starts with proper diagnosis.
This shirt says what every experienced mechanic already knows — slow down, test it, and fix it right the first time.
✔ Bold, easy-to-read design
✔ Classic red and yellow garage style
✔ Perfect for car guys, DIYers, and anyone tired of guessing
Dan’s Messy Garage — Real car problems. Real fixes.
Wear it in the garage, at the parts store, or anywhere people understand the difference.
More details
- 65% recycled polyester, 35% recycled Airlume combed and ring-spun cotton
- Lightweight fabric (4.2 oz)
- 32 singles
- Unisex sizing,
- Regular fit
- Side-seamed construction
- Tear-away label
EU GPSR Product Information:
- Manufacturer contact information
- Name: Dan's Messy Garage
- Email: contact@support.dansmessygarage.com
- Postal address: PO Box 5696 Santa Monica, CA 90405
- Additional information: This product is made for adults. 2 year warranty in EEA and UK, established by Directive 1999/44/EC.
Size & Fit
Quality Guarantee & Returns
- Quality is guaranteed. If there is a print error or visible quality issue, we'll replace or refund it.
- Because the products are made to order, we do not accept general returns or sizing-related returns.
Diagnose Don't Guess Size Guide
| Size label | Length | Width | Chest |
|---|---|---|---|
|
XS
|
27
|
16 1/2
|
31
|
|
S
|
28
|
18
|
34
|
|
M
|
29
|
20
|
38
|
|
L
|
30
|
22
|
42
|
|
XL
|
31
|
24
|
46
|
|
2XL
|
32
|
26
|
50
|
|
3XL
|
33
|
28
|
54
|