These Rawlings Incredi-Ball SoftStitch training baseballs have a nylon fabric cover that are soft to the touch. These Incredi-Ball training baseballs are suitable for all ages and can be used indoors or outdoors. Use indoors with comfort to know they won't leave marks on the floor. If you're looking for a safer alternative to hard baseballs for training, look no further than these Incredi-Ball softstitch training balls - get yours today!