ThinkGeek Star Trek Tribble Slippers with Sound
Finally, a way to put all those tribbles to work! With every step, your Tribble Slippers will purr happily. These pair wonderfully with a Star Trek Bathrobe for a lazy weekend or "sick day." 3 LR44 batteries for each slipper (included). You will need to flip the switch to "on" to hear the sounds. 100% polyester, One Size Fits Most. ( The footbed is 11" long. Approx Men's size 11/Women's 12) Washing Instructions: Surface wash only. Remove battery box before washing.