Zinc Oxide Tape
Product Review (submitted on February 21, 2012):
My first impressions were that this tape seemed to be longer than most commercial brands you can buy in the stores and less expensive.
Having transferred to hook grip my thumbs were taking a beating but now with the addition to the tape they're adapting fine!
If you ever rip a callous this tape can make it very easy to work around. I suffered from a small cut on my shin which wouldn't stop bleeding when doing barbell work but after using this tape it helped me work around this problem.
Cheap as chips and does the job.