I've been using Dunlop Stubby Triangles for quite many years, but the 1,5mm is my go-to bass pick. The pick is so sturdy that it doesn't give in when contacting the string, no matter how hard and what gauge of strings you hit. Although the material is pretty slick plastic, the center groove with its etchings give my thumb a perfect traction and grip. the 3mm version is just too much for me, I find it very clumsy. To each their own. Anyway, give these a shot if you're looking after a REALLY sturdy pick that slides right through the strings with minimal snag.