Made of high strength polyester webbing, will not deform or stretch during use, the load-bearing capacity can be as high as 3300 pounds. single rope tension up to 1100 lbs, strong and durable. The inner side of the steps is round reinforced solid wood, reliable and non-slip, and the two ends of the round wood are sewn onto polyester webbing, so you don't have to worry about it spinning during use.