These Rawlings Incredi-Ball SoftStitch training softballs have a nylon fabric cover that are soft to the touch. These Incredi-Ball training softballs 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 softballs for training, look no further than these Incredi-Ball softstitch training softballs - get yours today!