The purpose of the Ergodyne Proflex back support is simple: provide additional truncal support, limit range of motion associated with injury and remind your workers that they are lifting. Proflex back supports work great and are perfect for a work environment that requires heavy lifting. PackagingSuppliesByMail.com has 2 different kinds of Proflex®, the Standard 100 and Standard 1100. Try them out today, we promise you will enjoy them.