When stalking, drawing, or slow let down, the ULTRA-RESTis working for you (FULL TIME) totally supporting and capturing the arrow. Unlike (part-time) drop-aways that only work at full draw, drag arrow across the bow shelf, and allow the arrow to fall off the rest.VDT (Velocity Drop-Away Technology) Boasting Smart-Rest Technology, the patented VDT knows only to drop away when the bow is fired. The ULTRA-REST is the only arrow rest on the market to offer these features. The Ultra Rest offers minimal friction and zero fletching contact. Also shoots the shortest arrows possible.