So, should you repair or replace? Let's do the math. A simple repair like reattaching a hem or patching a small hole might cost $5–$10 if you take it to a tailor, or less if you do it yourself. If your Windbar tee cost $30 and is otherwise in good shape, a $5 repair is worth it. But if it's a $15 tee with thinning fabric, you're better off buying a new one.

Also, consider the cost per wear. If you've worn a tee 50 times and it's starting to wear out, you've already gotten your money's worth. A repair might extend its life by another 20 wears, but that's diminishing returns. For travel, you want reliability, not a tee that's going to fall apart in a foreign city.

My rule of thumb: if the repair costs more than half the price of a replacement, and the tee is past its mid-life, replace it. If it's a high-quality tee with a higher GSM and the issue is minor, fix it.