The material of the Swatch Star Mom Mothers Day Special Edition women's watch SO28Z108 watch case is plastic, its color is transparent, the material of the strap is silicon and its color is silver. The diameter of the watch case is 34 mm, its shape is wheel. The glass of the watch is plexiglas (plastic), its mechanism is quartz, and its water resistance is 3 atm (30m) (drip-free).