That's where planning and knowing your target market comes into play. There are certain segments of certain markets that just won't buy a shirt if it's under a certain price point, regardless of how the shirt is.
You could sell it for less, but then the people that are targeting just won't buy it. Then the people that do buy in that price point, may not like it. You need to understand where you fit in the grand scheme of things, and how and why your target market buys what they pay, and why they pay what they pay.
It can be priced to sell to the masses and if bought by the masses at that price point you'd do very well. But that doesn't mean it's made FOR the masses or that the masses will care that it's in their price point.
That's exactly why the OP needs to find out if the niche doesn't blink an eye at $25+. If not then market your product to them, just be aware that there are certain reasons that people in that market buy what they buy. Find out those reasons, and give them that in your product.