1.Anti slipping.
2.More comfortable for patient
3.Professional, Quality Guranteed.
4.Give patient more safe feeling.
5.Blue UV,LED,Blue Light. And anti fatigue

Dental Mix Composite Light Hood Resin Shading Protector Orange Shade Box 

Ivoclar Vivadent Vivapad Style Plastic Mixing Well With light-proof Cover 

Composite Cover Prvevent Ambient UV From Hardening Light-sensitive Setup

Exclusive Composite -Covers are proven to prevent any hardening of light-sensitive setups for more than 30 minutes.

Tested in a busy practice, covers allow efficient premixing and
dispensing of light-cured resins, and pre-application of light-cured
cements to ortho brackets, veneers and more.