I have been using them daily at work for several years to climb up and down vertical and inclined metal stairs on cranes at heights of 20-40 meters. They have the best grip out of all the ones I have tried, even on wet metal, despite not being waterproof. With the above usage, they last me for months, the only wear is the coating between the index finger and thumb due to friction with the metal on the non-slip treads. They also withstand washing

Very good, comfortable and durable, with a satisfying feel to the touch and very good non-slip properties.
They just need a little attention with sticky surfaces and objects, as they cause quick wear on the coating.
For their price, they are superb.

I don't know exactly what material it is made of, but it is very comfortable and pleasant to hold, and it has a very nice grip