TR90 frame means its durable, flexible, ground impact, resistant, and hypoallergenic Fully-adjustable rubber nose pads for ultimate comfort & stability and auto-lock stop hinge for sturdy fit Injected front & rubber non-slip temples to keep the frames lightweight and firmly Stainless steal front and temples provide an addotional layer of durability Comes with a soft microfiber pouch to keep eyewear clean and protected