Felted mitten pattern with flap?

Hello All! I have some awesome Cascade Pastaza yarn and need a felted mitten pattern for convertible mittens. (I am not sure what to call it but you pull the finger flap back and button it to the wrist to leave your fingers free.) Anybody got one they are willing to share?
Thanks so much!
Kate

YES! If you make THESE in a very chunky wool or alpaca with the needle size called for in the pattern, they will be HUGE…like a man’s size. Ive even made them on sz 9’s with Misti Bulky Alpaca and felted them lightly. They turned out GREAT! Its extra nice that way, because the wind doesnt get through them when they’re felted!