Truly superior performance vs any other sunglasses ive worn regardless of price. I bought a photochromic pair and will put them on pre sunrise and just never take them off through miles and miles of alpenglow, shade, sun, clouds, storms, you name it. The lenses transition transparently to the wearer and the clarity is phenomenal and they are extremely comfortable.
Only a few grams heavier than my other pairs and the weight is so well distributed that i dont even feel them. Longest ive worn them is for a 10+ hour day in the mountains and i basically forget that i am wearing them at all.
They will fog up slightly in very humid and wet conditions. I think its unavoidable though and these will clear up totally with even the slightest of cross breezes or direct sun. I hesitated a great deal in spending more money on these sunglasses than probably the last 6 or 7 pairs of sunglasses ive bought combined but in the end im glad i bought the Cutlines. I hope i never lose them but if i do i would rebuy.