Sennheiser's CX 400BT are its most affordable true wireless earbuds yet
Sennheiser CX 400BT True Wireless Earbuds - Bluetooth In-Ear Headphones for Music and Calls - with Noise Cancellation and Customizable Touch Controls, Black
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Amazon.com: Comply TrueGrip Memory Foam Replacement Earbud Tips for Sennheiser Momentum, Momentum 2 True Wireless, CX-400BT Earphones - Secure Fit and Noise Blocking, Black (Assorted, 3 Pair) : Everything Else
SENNHEISER Momentum True Wireless 2 - Bluetooth in-Ear Buds with Active Noise Cancellation, Smart Pause, Customizable Touch Control and 28-Hour Battery Life - Black (M3IETW2 Black)
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Sennheiser CX 400BT True Wireless Earbuds - Bluetooth In-Ear Headphones for Music and Calls - with Noise Cancellation and Customizable Touch Controls, White