Material:Silicone,Size:3.7 X 1.5 X 0.4 cm,Weight:1.2g Material ? silicone material from natural rubber, non-toxic and odor free,with a higher elasticity, never crack. It will not soak up sweat and dirt, with no feeling of sore ears after use, won't bother the backs of ears,and even won't notice they are on the glasses. ?100% SATISFACTION? If there are any problems with our products, contact us and we would be very happy to solve your problems. So Add to the Cart Now!