Med-A-Likra is a process of expanding the fibres in the thread, after the thread has been woven or knitted into a fabric form.

By applying an electrical surge to a woven or knitted fabric, while the fabric is under compression, the individual fibres compactly spun into each thread, are shocked apart from one another, creating catacombs throughout the thread.

These catacombs, along with the disfigurement of the individual threads, reduce the size of the spacing between each thread and also provide catch pockets to hold (trap) the user's natural body heat longer than the same fabric can without the Med-A-Likra process.