This drawing is a continuation of my series "Underwater explorations":fav.me/d8gvfwv
( lemurs scuba gear) ,fav.me/d8mbwsg
which are the fanfiction for "Legacy" comic by Kitfox-Crimson
(also in the original comic there no underwater and scuba-diving episodes yet).
The rats faction has their own design of scuba suits/environmental suits in which they used a full-faced masks with hoses, which connected to regulator, which mounted on back of the head, and provides a connection to various breathing apparatus backpacks even designed for humans. Than the front part of the mask is more free to different purposes. Also they use a masks with traditional front connection or half-masks with special mouthpiece.
So you can see a some female rat military/officer in ground uniform at left and some another anthro rat, which doing a some trainings in this environmental suit on ground. Also you you can see a rack with this suits - with masks at top and packed bodysuits in bottom boxes.
art (c) WLynx - 2015