Strong sturdy and sharp. Love the blue. My wife loves hers too.
I wear a 7 1/2 hat and glasses are a tad loose on my face. Takes some getting use to with the dramatic color change when you first put them on. To dark for dusk or dawn and during rain. I ordered a different amber lens set of glasses for 1/3 rd the cost of blue blockers and I wear them all the time. The blue blockers are stored in the glove box for emergency use in case I loose the less expensive HD sunglasses.Perfect dupe for a fraction of the cost! Sturdy. I cant wait to wear them on my Cancun Vacay.