It's cool to have logo gear (hats, shirts, etc) for a boat you cruise or race on, and it's even cooler when the crew gear matches.
You can of course order custom logo gear from a wide variety of suppliers, but that usually means the hassle and expense of ordering in quantity.
A good way to avoid such hassles is to use a supplier that makes it possible for you to have your own "storefront". Some will even host your storefront for free, with no order minimums. Once you've designed your logo (for which there is typically a reasonable setup charge), your crew can order what they want without having to design or coordinate orders.