Bose Warranty IS AWESOME. My QC35 malfunctioned and so did my Sleepbuds. They've exchanged it for the new 700 Series and I've exchanged the SleepBuds for the SoundSport Free. Freaking awesome! :
Bose QuietComfort 35 QC35 II Noise cancelling Headphone Bluetooth with microphone - Black | Back Market
Amazon.com: Replacement QC35 / QC35 ii earpads and QC35 Headband / QC35 ii Headband V3 pad Cushion Compatible with Bose QuietComfort 35 (QC35) and Bose QuietComfort 35 ii (QC35 ii) Headphones (AHG-QC35-COMBO) :
Bose replaced an out of warranty QC35 with QC45 with no fuss : r/headphones
Amazon.com: AHG Replacement QC35 Headband / QC35 ii Headband pad Cushion Cover. Compatible with Bose QuietComfort 35 Headphones (QC35) and Bose QuietComfort 35 ii Headphones (QC35 II) (Black) : Electronics
Amazon.com: Bose QuietComfort 35 II Wireless Bluetooth Headphones, Noise-Cancelling, with Alexa Voice Control - Rose Gold : Electronics