Not sold at retail, but you can browse Rycote
Some links here are affiliate links. If you buy through one, Creator Gear earns a commission, at no extra cost to you.
Creators cited with this
Potato JetYouTube, 1.1M followers“Reicho under covers to just kind of tape it and give it a little bit of wind protection.”
Watch the video at 3:122 more reports from Potato Jet
“Rycote Undercovers”
Watch the video“…also these are awesome it's Rycoate under covers and basically they're these little stickies that you attach so that you can wear underneath your shirt”
Watch the video at 1:48
Creators who use this also use
Sennheiser evolution G2 wireless lavalier system
also used by 1 of them
Sennheiser evolution G3 wireless lavalier system
also used by 1 of them
Sennheiser G4 500 Series Film Combo wireless lavalier set
also used by 1 of them
Sennheiser ME-66
also used by 1 of them

Sennheiser MKH 416 Shotgun Microphone
also used by 1 of them

Shure SM7B
also used by 1 of them