referring now in greater detail to the drawings in which like numerals represent like components throughout the several views , fig1 shows the exercise vest 10 of the present invention being worn by an exerciser 11 . fig2 and 3 show the vest 10 in greater detail . the vest 10 comprises an inner liner 12 and an outer liner 13 sealed together at their edges to form an air tight / water tight compartment ( not seen ) between them . the inner liner and outer liner are sealed together again along weld lines 15 to form a row of parallel , horizontal , spaced - apart ribs 15 dividing the air tight / water tight compartment into a plurality of horizontally stacked chambers , preferrably tubular chambers , or conduits 17 . the row of weld lines or ribs 15 , in the preferred embodiment , continues substantially the entire height of the backside 18 of the vest 10 , but does not continue the entire height of the frontside 19 of the vest 10 , although it is within the scope of this invention to do so . rather , in the preferred embodiment , as seen in the drawings , the ribs 15 , and thus the tubular shaped conduits 17 , are formed only along the lower vest region 22 of the frontside 19 . the ribs 15 do not each form a continuous seal along its length , but rather , each rib 15 defines at least one small passage 21 interrupting the seal and communicating between the adjacent chambers or conduits 17 . a plurality of spot welds 25 , spots 25 , are interspersed throughout the vest 10 sealing together the inner liner 12 and outer liner 13 again at predetermined locations . two fluid inlets 28 , 29 are defined in the outer liner 13 at the upper vest region 32 of the frontside 19 of the vest 10 . as shown in fig4 the lower inlet 29 comprises an opening 34 of , for example , approximately one inch diameter and a plug 35 for removable insertion in the opening . the upper inlet 28 comprises a valve or nipple 36 including a smaller diameter opening 37 , for example , approximately one - quarter inch in diameter , and a plug 38 for removable insertion into the opening . to use the exercise vest 10 of the present invention , the exerciser 11 or other user 11 introduces water , or other fluid weight medium , into the compartment through the opening 34 of the lower inlet 29 . the opening 34 is wide enough to facilitate the use of a faucet or water hose . the water flows from the upper vest region 32 downward , passing successively through the tubular shaped conduits 17 to the lowermost conduit 17a . as the lowermost conduit 17a fills to its capacity , the water enters and fills the next higher conduit 17 , and so on up the vest 10 . the ribs 15 and spot welds 25 cooperate to minimize the shifting and sloshing of water during exercising and to prevent distortion of the vest , such as by ballooning . once the user 11 has introduced enough water into the vest 10 to produce the desired weight , he plugs the lower fluid inlet 29 using the plug 35 . then , using the upper fluid inlet 28 , the user blows air into the vest 10 , to occupy the space within the vest compartment not already occupied by water . other embodiments of the invention may include only a single fluid inlet through which both the air and water are introduced into the vest . the air fills out the vest to maintain its shape and to insure a proper snug fit in accordance with the respective sizes of the user and the vest . a user 11 should choose the proper vest size by fitting the vest in its fully inflated state . the fluid , be it water or air , fills the compartment chambers of the upper vest region 32 about the neck and shoulders and serves to cushion the shoulder and neck of the user 11 from brusing and other effects of the added weight . in addition , the inflated nature of the vest 10 , due to the water and air , cushions generally the entire body - vest contact areas . with the vest worn on his body and supported from his shoulders about his upper body or upper torso 39 ( see fig1 ), the user 11 fastens the buckles 42 on the straps 40a , 40b and pulls the vest to the desired tightness . the air and water are easily expelled from the vest 10 by removing the plugs 35 , 38 and pouring , squeezing and otherwise forcing the fluids out . with the water expelled , the vest is easily folded and transported in a suit case or gym bag . although it is preferrable to fill the upper vest region 32 with fluid to increase weight and / or enhance cushioning , it is within the scope of the invention to eliminate the fluid compartment of the upper vest region 32 . in such an embodiment , the upper vest region 32 of the vest 10 functions solely as a means for supporting the fluid filled compartment of the lower vest region 22 from the shoulders of the exerciser 11 . the fluid inlets 28 , 29 in this alternative embodiment should be relocated to the lower vest region 22 . a specific example of the present invention is as follows : ( see drawings ) the exercise vest 10 comprises an inner liner 12 and an outer liner 13 made of vinyl or like water - tight , flexible material . the liners 12 , 13 are sealed together at their outer edges to form a vest , open at the frontside 19 and including a widened neck region 43 , and two opposing arm holes 44 , 45 . the vest 10 includes eight horizontally aligned , parallel , sealed , one - eight ( 1 / 8 ) inch wide ribs 15 of different lengths , at intervals of about two inches . between adjacent ribs are reinforcement sealed spots or spot welds 25 . there are two pairs of straps 40a , 40b including buckles 42a , 42b attached to the lower vest region 22 at the open frontside 19 . while the ribs 15 of the preferred embodiments have been arranged horizontally , it is within the scope of the invention to align the ribs vertically or at any other orientation . it is the function of these ribs 15 to control the flow , movement and distribution of water in the vest and to aid in preventing distortion of the vest 10 . whereas , the preferred embodiment of the present invention shows the vest being open and fastened at the frontside 19 , it is within the scope of this invention to have the open and fastened portion anywhere about the torso circumference , for example , under the arms . while this invention has been described in specific detail with particular reference to preferred embodiments thereof , it will be understood that variations and modifications can be effected within the spirit and scope of the invention as described herein before and as defined in the appended claims .