This is an honest opinion based on my experience.
The advertiser's photos, data and description are true to reality.

The K&F Concept cover made me quite happy. And look, I'm a tiquismiquis with these things, but they've done their homework here. As soon as you take it out of the box, you can tell that it is well made: clean seams, materials that don't smell like cheap plastic, and a zipper that goes as thin as if you had butter on your teeth. I appreciate those kind of zippers that you don't have to fight as if they were an escape room puzzle.

You put in the lens and it fits perfectly. It doesn't move, it doesn't dance, it doesn't make weird noises... nothing that would make you nervous when you're walking around with your equipment on you. The padding is generous, it feels fluffy, but not exaggerated. Protects well without turning the cover into a travel case. It gives me peace of mind to wear it like this, even if you're walking through a forest, climbing a hill or fleeing a storm (photographers and questionable decisions, you know).

The outer fabric withstands rain well. It's not a raincoat, but if you get caught in a downpour, that's okay. Of course, if it gets wet, it's best to dry it as soon as you can. Inside, it also has a mesh pocket in the lid, which is like the secret pocket where you put that lens cover that always mysteriously disappears. Spoiler: it still doesn't appear, but now I have a place to save it.

I also liked that you can wear it however you want: hanging on the shoulder with the strap (adjustable, of course), attached to the belt with a velcro system that doesn't even go away, or directly with the handle above. Even the cover stays open when folded away, as if to say: “Come on, insert the lens without drama”.

Bring an air blower. It's not a NASA rocket, but for quick sensor cleaning or dust removal it's fine. Although good, if you already have a better one, you can leave this one for your computer keyboard or to blow on your friends when they fall asleep editing photos.

The L size is great for me with lenses such as a 24-70mm, or an 18-105. Larger ones are already very fair, so it's better to measure well first. In my case, the measurements they gave were quite accurate, so good there.

Honestly, I think it's a very well thought out cover, without posture or nonsense. It protects, it is comfortable, it does not weigh, and it has nice details. If you have a lens that you're afraid to wear loose or in a shabby bag, this is a pretty round option.

I'm already thinking about getting another one for another purpose. What do you hear, if my lenses are like my creatures, unless they sleep in a good bed.