Best underwear for men with bigger privates?

My boyfriend has been complaining abut his underwear when we do athletic things together, like going on a long hike. He needs something that provides support but also prevents chafing. What are some athletic underwear that hold his 'boys' in place and support them while also keeping them from chafing? Are there any underwear with a special pouch to provide some separation?

Best underwear for men with bigger privates?
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