The XL Plungers have an extra-wide opening which allows for the suction of an extra-large area. The unique easy-push design creates a powerful vacuum that clings tightly to your flesh. As blood flow to the nipples increases, they will become more sensitive, making play more fun! Leave the suckers on or take them off for access to extra-sensitive and swollen nips during masturbation, foreplay, or sex! Made of premium-grade silicone, these suckers are not compatible with silicone lubricants, so it is recommended that you use a water-based lube to create a tight seal.