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IP68 rating means they're fully dustproof & waterproof, with complete protection against solid particles and the ability to survive being submerged deeper than a meter in both fresh water and sea water. Even the charging case is IPX2 water-resistant, so it can come along on your next rainy-day run.
Amazon.com: JBL Endurance Race 2 - Waterproof (IP68) Sports True Wireless Earbuds with 4 mics for Crisp, Clear Calls, JBL Pure Bass Sound, 48Hrs of Playback, Plus Speed Charging & Active Noise Cancelling (Blue) : Electronics