When sourcing rubber or silicone adult novelties, the most critical factor is material biocompatibility. You must ensure the products are made from medical-grade silicone or phthalate-free TPE/rubber to prevent skin irritation or chemical leaching. Always request RoHS and REACH certification to confirm the absence of heavy metals and hazardous substances. Additionally, check for non-porous surfaces, as these are easier to sanitize and prevent bacterial growth, which is a key selling point for high-end markets.