Been messing with grips for this project and found myself having issues with using your standard tpus. Especially with something you'll put force on, standard tpu is about as grippy as a wet eggplant and is still very hard on the shores with detail (95a in my initial test). Printed the grips in the pic with tpu air with the most foam (advertised as \~65a with most foam) and had very good results. Also used fuzzy skin but the grips don't have as much of an edge to them and actually grip to your hands without any post processing or coating needed. #technology source