The Performance Blend: Introduced a year ago, the T1 has quickly earned a reputation as one of the best goggles in the industry. Its lightweaight frame was designed for a low profile medium fit, but offers the expanded peripheral vision of a much larger frame. You will notice the seamless fit and expanded vision field the moment you put it on. Dye integrated quick clips for a frameless look and easy lens changing, leaving the perimeter of the frame onobstructed for 360 venting that provides exceptional breathability with zero blow-through.