As William suggested a pickup for the guitar to record direct is the best way to eliminate environmental sounds.  In that case you plug the guitar directly into the audio interface. 

Any kind of isolation from surrounding noise would help.  What you're describing is a vocal isolation shield.

https://www.sweetwater.com/se-electronics-reflexion-filters/series

It does help some, but it won't eliminate all environmental sound.  There is also a more expensive option that is a whole booth to stand in!

https://www.amazon.com/Portable-Foldable-Recording-Studio-Equipment/dp/B0C5DHTNBC

Hope that helps!