Get access to everything we publish when you sign up for Outside+.
These safe, heavy-duty, slow-deflate quality 55cm SPRI® Xercise Balls® are durable enough to withstand diverse training applications in any club environment. Professional Plus (slow-deflate up to 350 lbs.) Xercise Balls® were designed for heavy use in all workout environments. SKU:SXBPP55SL