Ringor turf shoes with a pitching toe.
Diamond Dynasty II Pitching Toe Turf Trainer Shoes with Pro-Tec-Toes | Ringor Fastpitch Softball
I buy the cheapest sneakers that I can find for my daughter's indoor pitching lessons because the toe drag kills them fast. I found the more expensive sneakers, like Nike etc. do not slide like the cheapies and mess up her stride. I usually order the $15 ones off Academy.com and they will last about 4-6 weeks. My daughter just turned 11 and still in youth and her foot is growing fast which is another reason I go for the cheapest I can find.