Abstract: A removable inflatable device for temporarily plugging holes in an ice layer for assisting fishermen in maintaining or preserving a previously formed hole in the ice layer during periods of absence when the hole is left unattended. The inflatable device includes a hollow generally cylindrical tubular assembly with an inflatable bladder forming the core, and having a plurality of discrete layers enclosing the inflatable core which include a foam liner enclosing the bladder and an outer sleeve disposed over and firmly enclosing the foam liner and inflatable bladder. The foam liner comprises a layer of synthetic resinous foam with a generally closed-cell structure, and is wrapped about the exterior of the bladder so as to form an overlapped segment along the axial length of the bladder.