Design and Details Attaches to the ASCENSION ascender for rope ascents Underfoot strap is abrasion-resistant and is slightly rigid to make it easier to step into Adjustable elastic keeps the foot in the foot loop with any type of shoe Mini DoubleBack buckle easily and quickly adjusts length of foot loop For use with the ASCENSION or BASIC Foot loop is reinforced for abrasion resistance and ease of use and comfort while standing