Tifosi intense single lens sunglassestifosis intense single lens sunglasses are developed for durability and comfort though these are entry level sunglasses they still offer top quality features you wont find in similarly priced sunglasses virtually indestructiblethey have a virtually indestructible grilamid tr 90 frame vented lenses that increase airflow and prevent fogging and an adjustable nose piece for a customised fit the more you sweat the more the hydrophilic rubber nose and ear p