Gender X Undergarments Briefs Light. Comfortable and easy to put on, these vagina briefs feature a penetrable shaft with a realistically soft channel and life like entry. The channel can also be accessed from the inside to double as a urination device. Specifications: Made from phthalate free and latex free Silicone. Waterproof and submersible. Measurements: Waist circumference 22 inches. Hips circumference 32.3 inches. Thigh circumference 16.9 inches. Length 7.1 inches.