My Grandfather is experiencing Numbness( no sensation ) in His legs mostly in lower bottom region, or can say floor of legs . He says that "he can't sense on which type of floor he is walking or even he is walking or not". He encounter many problem while wearing the slippers, he also says he experiences pain in upper region of legs ( from patella to ankle bone). Problem is in both legs, Problem started way back when he was 60 year old. Thanks in Advance.. :-)