These Nike trunks are designed for adult males and offer a regular fit. No specific 'setup' is required beyond choosing the correct size. To ensure longevity and maintain performance, always follow the care instructions. They are `machine washable`, which makes care simple and convenient. Use a standard laundry detergent and wash with similar colors. It is generally recommended to wash underwear in cold or warm water and tumble dry on a low setting or air dry to preserve fabric elasticity and integrity. Avoid using bleach or harsh chemicals, which can degrade the material over time.