It has a small hole, the headphone cap can be taken off so that you can wash the hat.

Original Colorful professional Metal HIFI Waterproof Monitor Headphone Earphone

Super Clear Bass Stereo 3.5 mm

Noise Cancelling Earphones Jogging/Sport Comfortable Wearing Headphone

Portable With/Without Microphone

Voice Control Bluetooth 4.0

Wireless Handsfree Mobile Music Earphone High-Quality Neckband Common Headphones for PC For All SmartPhones for Xiaomi Sungsum for iPhone Computer MP3/4 Player, for Xiaomi mi band 2, headphones for a mobile phone, -compatible speaker, TV

Feature:-Support Bluetooth-compatible Communication And Bluetooth-compatible

Music-Low Loss High-Quality Stereo

Sound-Built-in Lithium-ion Battery With Micro USB Charging Function,charge via USB Cable, long stand-by time

LED Display For Working Status

Use Friendly Function Design-Knitted material, fashion and keep warm with answer the phone in winter.-Set-in MIC, available for cell phone to transmit the speaking phone to your audio devices directly so that the user can hand free answering phone up via the device.

Support display receiver battery on iPhone.

Specification:

Transmission distance: 10M

Charging time: 2H

Bluetooth-compatible talk time: 6-8H

Power/Handfree/Stop/PlayVol Up/NextVol Down/Previous