These are probably the best resistance bands out there. The materials and construction looks and feel high quality. Soft grips. Sturdy materials. Plenty of tension. Also, and most important in my opinion, is that the bands are SLEEVED not like most other bands that you can find in Amazon and other shops that are totally nude with the risk of hurting you so bad. Sleeved bands are a must if you want to stay safe. You can also buy sleeved bands from Adidas but they are more expensive and you can't combine them, and also you can't use them with a door because there's no door anchor option, so it's pretty worthless IMO. Superb product.