Gamma RZR Rx is a monofilament string designed for big hitters who are looking to balance control with comfort. Made with a proprietary Thermoplastic Elastomer, Gamma has designed this one to stretch more on impact. The result is more shock absorption than is commonly found in traditional poly-based monofilaments. In addition to offering big hitters a softer ride, this one also has impressive spin potential and fairly lively response for the breed. The jumpy spin-laden response is partly due to the slick surface which allows the strings to snap back with greater force.