Premium Build for Safe and Effective Workouts: Built from high-quality materials including non-toxic NBR tubing and thick foam handles, these 21 Fitness Resistance Bands-6 Tube Pedal Ankle Puller units ensure comfort, safety, and durability. The foot pedals are non-slip and ergonomic, helping you train with confidence. All-in-One Abdominal Exercise Equipment: Work your core like never before. Whether you're doing sit-ups, crunches, or leg lifts, this is your go-to abdominal exercise equipment. It also functions as reliable sit up exercise equipment with added resistance for faster results.