Headphone (a) has an IPX2 rating, tested under controlled laboratory conditions in accordance with the IEC 60529 standard.
The headphones are not designed for swimming, water sports, or shower use. If exposed to sweat, light rain, or splashes, gently wipe them with a soft, dry, lint-free cloth before placing them back into the carrying case. Do not use heat sources or compressed air to dry the headphones.
Please note that liquid immersion damage is not covered under warranty.