Ok.. So first, for all you folks who don't know what a stag is, Here's the definition:
A person who attends a social gathering unaccompanied by a partner, especially a man who is unaccompanied by a woman. A social gathering for men only.
Now, to embrace the stag lifes, you must get your stag fashion on. And there's a cool website that sells stag t-shirts. It's called Custom Planet.
To learn more or check out all the customization options, check out https://www.customplanet.co.uk