Reebok - Nano X3. Color Cold Grey/Core Black/Gum. On sale for $42.00. MSRP $140.00.. 4.1 out of 5 stars+9Brand NameReebokProduct NameNano X3GenderUnisexColorCold Grey/Core Black/GumPrice$42.00MSRP: $140.00Rating4Rated 4 stars out of 5(358)