Tantus Mark O2 Semi-Realistic Dual Density Dildo Warm Ivory (Bag)Mark is an average sized harness compatible dildo made of Tantus Ultra Premium 100% Silicone Dual Density O2 material and boy does he feel real. Mark features a super soft outer layer of silicone and a dense inner layer specifically designed to deliver maximum satisfaction through a realistically familiar feel. Weve created a thicker base for added stability when used with a harness with lifelike veins on the shaft for extra pleasure. It has a slight