Reshow In-Ear Sport Headphones Black &ndash; Earbuds with Stereo Surround Sound &ndash; Anti-Slip Noise Isolating Earphones with Heavy Bass &ndash; In-Line Microphone &ndash; Sweat Proof for Gym, Fitness, Exercise & CrossFit ADVANCED NOISE ISOLATION  Enjoy superior clarity and bass with our immersive, in-ear headphones that reduce outside distractions for better sound. ANTI-SLIP SWEAT PROOF DESIGN  Made with an ergonomic, comfort fit design, these in-ear headphones fit comfortably, wont fall out and reduce sweat. HANDS FREE CALLING  Featuring a built-in microphone convenient for making and taking calls, you can also play, pause or skip music. COMFORTABLE SIZING  Crafted with lightweight, durable silicone, our earbud ear tips wont irritate your skin or ears even with extended use. ULTRA COMPABILITY  Compatible with any 3.5mm audio jack, making it perfect for your smartphone, mobile device, speaker or MP3/MP4 player.