Protective design Provides a reliable watertight seal while fitting closely to a wide range of face shapes for comfortable, safe underwater use during every dive. Adjustable fit options Features an adjustable buckle and strap system that can be tailored to different head sizes, ensuring secure and stable performance during deep dives. Enhanced wide view 180degree panoramic field of view with tempered glass lenses for clear underwater visibility in varied lighting and current conditions. Sturdy construction Built from quality, durable materials to withstand extended deep diving training while maintaining longterm reliability and performance. Key attributes Function: watertight seal, wide field of view, secure adjustable fit Compatibility/Size: fits most adult head sizes with adjustable buckle and strap Material: tempered glass lenses; constructed from durable materials Performance: reliable water sealing, clear vision, and lasting durability for training and frequent use Use scenarios Deep diving training in open water or pool environments, where a secure seal and stable fit are essential for practice and safety Wreck, cave, or drift dives that benefit from a wide 180degree view for improved situational awareness Travel or rental diving settings, where quick size adjustment and dependable performance support divers of different head sizes and experience levels