an individual uses the exercise device on a seat or other surface not having a back portion such as on a bench or bed the device is generally limited to being placed under the buttocks of an individual when an individual sits on the device his or her weight acts as a stabilizing force such that when the individual extends the resistance bands the individual 39 s weight maintains stability the materials of construction for the various components of the portable exercise device of the present invention can vary depending on the requisite durability intended loading capacity of the resistance members intended user and other factors for instance the flexible base member can be provided with or without interior padding such as one or more foam cushions one or more memory foam cushions one or more gel packs synthetic fill material down material feathers cotton hypoallergenic material buckwheat loose plastic buckwheat imitation material rice or any other suitable fill material in further alternatives the flexible base member can be inflatable with a suitable gas liquid or gel the fill inflation material can be in one large pocket whereby the user can move the material from the outside to provide a confirming shape or separate compartments for instance as shown with respect to fig7 the material for the flexible base member with or without filling can include a variety of materials preferably having a high degree of flexibility to allow a user to fold crumple or roll the flexible base member into a very small volume to.