How Do Factories Create Hidden Waist Pockets in Running Shorts?

Hidden waist pockets need stable openings, suitable depth, and secure waistband integration.

Lightweight components need compatible assembly and reinforcement to avoid distortion. Define the materials, placement, seam method, and finished measurements clearly, then inspect the detail after movement and care; an attractive flat sample does not establish secure performance during repeated athletic use or laundering. Test intended contents during movement.