The soft baseballs are made up of PU foam, soft and elastic, against a wall, window or even a mirror. Material: PU Polyurethane. Three sizes of baseball for you reference, you can buy different sizes of baseball to feels.
Lightweight 9 Training Baseball / Softball - , PU Foam, Soft and Safety, 2 - AliExpress
11inch Teeball Baseball Soft Tball Top Quality PU Foam Pro Bounce Outdoor Game For Kids Children Teenage Barehands Ball Training
Foam Baseball Softball Standard and Oversized Foam Training Ball for Kids Teenager Players Reduced Impact and Prevent Injury Practice Baseball 12Pack
Bac-kitchen 15 Pack Foam Baseballs, 9 Inch Soft Baseballs Training Pitch Baseball Baseball Stress Ball with Drawstring Bag(Yellow) - Yahoo Shopping
Soft HIT Lightweight Training Softballs
iNextStation Foam Baseballs 12 Pack Practice Baseballs 9 inch Perimeter Sports Training Baseballs for Kids Teenager Players, Soft Baseballs for Practice, Hitting, Batting and Fielding : Sports & Outdoors
6 Pack Practice Baseballs Foam Baseball Ball Baseball for Kids Teens Softball
Easy to match:Soft padding batting, can be used with softball bats and gloves. Wear-resistant and High Elasticity: Soft baseball design, high
12 Training Practice Pu Foam Soft Baseballs Game Play Ball Mixed Color US
Soft Hit™ Foam Baseballs and Softballs