Size should come first, using the child’s waist measurements or age-appropriate charts. Next, pick the cut (briefs or trunks) based on comfort and activity level, such as active play versus school wear. Then choose a material that balances softness, breathability, and durability, with a focus on cotton blends and a touch of stretch. Finally, consider features like a soft waistband and flat seams for all-day comfort. For Puma, prioritize everyday wear or sports-focused options aligned with the child’s routine.

Fabric composition and stretch determine comfort and fit the most. A soft cotton-rich blend with a bit of elastane provides surface softness and keeps its shape with movement, which matters for a 7-year-old who runs and plays. Breathability helps prevent overheating and skin irritation during long wear. Look for flat seams and tagless designs to minimize chafing and itching.

Active kids need underwear with secure stretch and moisture management for sports and play. For classroom or light activity, prioritize comfort and a snug fit with softer waistbands. In Puma lines, select styles designed for movement and all-day wear, choosing breathable fabrics if the child is active during the day. The goal is to balance practicality with comfort for both settings.

Follow the care label directions and wash with like colors. Use a gentle cycle with mild detergent and avoid chlorine bleach on colored fabrics. Tumble dry on low or air dry to protect elasticity and fabric integrity. Store them in a clean, dry place to prevent odor buildup and maintain softness.

Start with the size chart and measure the child’s waist; if between sizes, choose the larger for comfort. Ensure the waistband sits flat and the underwear fits snugly without digging in. Move up a size if you notice reduced stretch, stretched-out fabric, or the garment strains during wear. This helps keep the fit secure as the child grows.

Choose items from Puma’s kids range that emphasize soft seams and tagless options for sensitive skin. Check that fabric is durable, colorfast, and stitched evenly for longevity. Look for basic textile safety assurances and brand reliability to ensure comfort and peace of mind for everyday wear for a 7-year-old.