Designed Around Real Life, Not Just Workouts. The FED Fitness BT4 was created from thousands of real customer insights to make rebounding easier, quieter, and more enjoyable from day one. From 90% pre-assembled setup to a smooth, low-impact bounce, every detail is designed to remove friction so you can focus on building a healthier routine. Built for Real Homes: Quiet, compact, and family-friendly design Made to Move Better: Low-impact bounce that helps protect your joints Ready in Minutes: 90% pre-assembled with a frustration-free setup Designed to Last: One-piece frame and premium bungee system for lasting stability