The product is made of very good quality rubber, you can feel under your finger that it is not just anything, the inner tube is not thin so it will be easy to puncture or as they say pinch it when putting it on. It fits well even in an old tire that I have.
Tire Tech's 70/100-19 2.50/2.75-19 3mm inner tubes are mega-cheap! If you like to ride hard and don't want to worry about punctures, these are the inner tubes for you. Sturdy and tough as a tank, they give you the confidence that even on rough terrain they won't fail. Seriously, this is the best choice if you want to have peace of mind and enjoy your ride without any interruptions. I recommend to anyone who wants top quality inner tubes!