Runderwear Men's Anti-Chafing Boxers (5" inch) - lightweight, breathable, moisture-wicking sports and running underwear - chafe-free running, hiking, walking and other activities (Black, M) at Amazon Men's Clothing store
Runderwear Men's Briefs - Chafe-Free Running Underwear (Black/Cyan, Small (30" - 32" waist)) at Amazon Men's Clothing store