Universal Advanced Silicone Skirt (UASS) Innovative wrap-around geometry in a new grade of crystal-clear silicone provides the optimal fit and comfort for a wide range of face shapes and sizes.Advanced Fit Technology (AFT) Skirt features differently textured bands of silicone to form a superior seal and maximum comfort. The high-grade silicone flexes to mold naturally along the contours of your face for a comfortable, leak-free seal.Split Strap Unique to the Reveal, this innovative split head strap design is longer around the middle to perfectly and comfortably accommodate the spherical shape of the head and keep the strap securely in place.Quick-Fit Buckles The one-touch button allows for easy adjustment, even while wearing thick gloves. The buckles are attached directly to the skirt to provide increased fit stability.