Overview:1. [Safe silica gel] Naturally extracted silica gel material, green, non-toxic and odorless!2. [Safety and sturdiness] Select the material, the joint is double-stitched, firm and beautiful!3.[Long-lasting stickiness] Long-lasting bio-adhesive, delicate touch and lasting stickiness4.[Pull up support] Strongly gather the cups, stick to the chest to gather up!Specification:Name: No steel ring...