Products with internal beads or weight systems need slower language. This report explains how we check surface comfort, weight progression, retrieval design, and conservative use guidance.
This report is a method or R&D note. It informs future product selection and product-page language rather than pointing to one material group.
This is product-use framing, not treatment advice. Users with pain, injury, pregnancy-related concerns, or post-surgical questions should consult a qualified clinician.