here you go....

It's a CO2 powered pillow for those fuck me moments---always have worn one, from the early 80s windsurfing, though kiting till now...
I do still kite, I'll have you know...
anyway, you can find these in Fishing/outdoor emporiums (Bass Pro Shops in the USA)
just strap it on and swing it around back---- there if you need it but unnoticeable when you don't
PERFECT
Rock-on
fokiten