Saba is a medium-fit design and uniquely designed as a dual-lens frameless professional mask that has extraordinary qualities and features on the market. Classic Soft Crystal Silicone Skirt ? The mask material is extremely comfortable to wear with Double-Edged Facial Seal Technology. All Direction Swivel Buckle system ? The distinctive feature equalizes the pressure evenly against the face. It drastically improves the user's diving experience. Soft Silicone Nose Pocket ? This feature prevents ear clogging when divers get into deep water. It equalizes the internal ear?s pressure by simply pinching your nose shut, inhaling a mouth full of air, and closing your mouth.