The Nitro Eclipse golf ball marks Nitro Golfs first use of ? Tu Tone? technology to create balls with enhanced in-flight visibility. This extra visibility allows you to assess the spin of the ball & the winds influence on it more easily & allowing you to hone your skills. The balls feature a two colour semi-transparent cover that provides a soft feel, while the special blend of titanium polybutadiene core ensures a ball that has excellent flight & distance.