$11.99 for Altus Athletic Ab Sling Set ($36.99 List Price)

With a pair of strong, steel hooks, these ab slings attach to standard chin-up bars and gym equipment. Their embracing loops feature thick, soft inner-padding to prevent arm discomfort. Slip your arms through and bring your legs up; begin working to develop abs so tough you can grate an aged cheese on them.

Pair of ab slings
Attach to standard chin-up bars and equipment
Thick inner pad keeps arms comfortable
Secure steel hardware