I just saw your post, but as someone who loves the great outdoors, I totally understand the importance of having comfortable gear that stays in place. In terms of boxer briefs, I've heard great things about the Under Armour Men's Tech 6" Boxerjock. They're designed to wick away sweat, stay in place during physical activity, and are made with anti-odor technology. If you're interested in getting started with boxing, I highly recommend checking out some of the
best starter boxing gloves. There are plenty of affordable options out there that are still high quality, such as the Everlast Pro Style Training Gloves or the Venum Challenger 2.0 Boxing Gloves.