referring now to the drawings , a paint brush protective cover is generally designated by the numeral 10 . the paint brush protective cover 10 includes a single jacket 12 made from an anti - stick polymer plastic , such as polystyrene , so that paint will not readily adhere to the jacket 12 . this will aid in the wet storage aspect of the invention . the jacket 12 can be rectangular in shape and it is contemplated that the jacket 12 can be configured with various shapes and sizes so long as the objectives of the invention can be maintained . the jacket 12 should be sufficient enough size to contain a lower end 13 of the paint brush 14 and at least part of an upper end 15 of the paint brush 14 . by way of example , the jacket 12 is configured for a 2 ″ brush 14 . the jacket 12 has a hollow interior section 16 which is defined by a first panel 18 and a second panel 20 of the jacket 12 which are removably connectable to one another in a manner to be maintained in a predetermined spaced relation . each panel 18 and 20 has an upper end 22 and 24 , respectively , and a lower end 26 and 28 , respectively , which are configured to be complementary connected in a manner with the upper ends 22 and 24 adjacent one another and the lower ends 26 and 28 adjacent one another . the first panel 18 includes lateral connecting surfaces 30 a and 30 b and can be configured to be received inside of the second panel &# 39 ; s lateral connecting surfaces 32 a and 32 b . by way of example , lateral connecting surfaces 30 a and 30 b can include detent surfaces 31 a and 31 b or other friction fit surface to improve connection with connecting surfaces 32 a and 32 b . a laterally extending tab 34 can be provided on the first panel 18 to aid in separating the panels 18 and 20 once connected . the jacket panels 18 and 20 are of a length greater than a combined length of filaments and at least a collar part of the paint brush retaining the filaments and preferably a greater than a combined length of filaments ( herein referred to as lower end 13 of the brush 14 ), and collar part of the paint brush retaining the filaments and part of the handle ( herein referred to as upper part 15 of the brush 14 ). upper ends 22 and 24 are configured to retain about the upper part 15 of the brush 14 and lower ends 26 and 26 are configured to retain about lower end 13 of the brush 15 . each panel 18 and 20 can include a plurality of laterally spaced elongated openings 36 and 38 , respectively , which extend from respective upper ends 22 and 24 , respectively , and into the lower ends 26 and 28 , respectively , terminating at a predetermined distance “ x ” short of an edge 40 and 42 of each panel 18 and 20 , respectively . in this regard , it is important to note that the openings 36 and 38 can preferably not extend to a point beyond the length “ l ” of the filaments of the brush when stored within the jacket as this could permit the filaments to become disfigured by protruding outside of the openings 36 or 38 . productivity guide and wear bars 27 and 29 are provided . openings 36 and 38 extend lengthwise from each the respective upper ends 22 and 24 into the lower ends 26 and 28 respectively terminating at a predetermined distance from a lower end edge 40 and 42 , respectively , and are defined by top edge 60 and 62 , bottom edge 64 and 66 and side edges 68 and 70 respectively . productivity guide and wear bars 27 and 29 extend transversely through the panel openings 36 and 38 , respectively , and interconnect the side edges to retain filaments of the brush and serves as a visual productivity guide and wear indicator for filament length . the productivity guide and wear bars 27 and 29 aid in retaining the filaments 13 of the brush 14 . the productivity guide and wear bars 27 and 29 can preferably include a curved rib cross section which aid in guiding the filaments 13 , broken and unbroken , into the jacket 12 . the productivity guide and wear bars 27 and 29 provide a good visual indication of the productivity remaining of the brush 14 and aid in retaining filaments 13 within the jacket 12 . accordingly , each lower end 26 and 28 of each panel 18 and 20 , respectively , there remains a continuous transverse section to retain the filaments and into which the openings 36 and 38 do not extend . the plurality of openings 36 and 38 are thus located on the jacket 12 for allowing fluid such as paint , solvent , or air to circulate within the protective cover and about the filaments of the brush 14 . a handle opening 44 is formed in end surface 23 of the jacket 12 adjacent the upper ends 22 and 24 of the panels 18 and 20 allowing the handle h of the paint brush to protrude out of the jacket 12 . the handle opening 44 is formed between laterally extending connecting surfaces 30 a , 30 b and 32 a , 32 b and ends 22 and 24 of each of the first and second panels 18 and 20 all of which serve to retain about the handle h . sides 32 a and 32 b do not extend the panel 20 to permit flow of paint out of the end of the jacket 12 when closed . one may open the jacket 12 to expose a hollow interior section 16 . the interior section 16 is where the bristles of the paint brush 14 will be stored in wet or dry manner . the first panel 18 is connected together the second panel by a junction panel 50 and is characterized as a living hinge which is a special type of connector style that is bent while the plastic piece is still warm right out of the mold . junction panel 50 includes a lower opening 41 to readily permit drainage . opening the jacket 12 will expose the hollow interior section 16 enabling positioning the paint brush 14 within the jacket 12 and when closed protect the bristle or filament 13 configuration of the brush 14 . the openings 36 and 38 provide for retention of the bristles while being stored in paint in the case of the jacket 12 being submerged into paint with the brush 14 therein as seen in fig1 . upon removal , these openings 36 and 38 provide for quick drainage of paint from the jacket 12 so that the jacket 12 can be readily opened without causing a paint spill . after removal of the brush 14 from the jacket 12 , any remaining paint on the jacket 12 should easily drip off . after a job , the brush 14 is cleaned and disposed back in the jacket 12 where the openings 36 and 38 will allow air to circulate therein . the air will allow the bristles of the paint brush 14 dry quickly after being cleaned and prevent mold and mildew from forming inside the jacket 12 . the protective cover 10 can be preferably be molded such as by injection for example . in this way , the components herein described are integrally formed . while the application has made mention of a preferred use with professional paint brushes , it is conceived that the invention can be employed with various sized brushes , such as artist brushes or the like , wherein the protective cover 10 would be reduced in size to accomplish the intended goal of the invention . while the invention has been particularly shown and described with reference to preferred embodiments thereof , it will be understood by those skilled in the art that the foregoing and other changes in form and details may be made therein without departing from the spirit and scope of the invention .