Due to Hurricane Michael there may be a 2 day delay on shipping. Thank you for your understanding.

4D PRO USA

4D PRO® - The Original Bungee Trainer

Say good-bye to boredom once and for all: a few simple moves is all it takes to convert the 4D PRO® sling trainer into 4 highly versatile training tools. Included are a durable resistance expander, an elastic rope, a conventional non-elastic sling trainer and a dynamic sling trainer that offers lots of elasticity.