4ft stretch bands are made of durable material and come in 3 varying resistance levels. This makes them perfect for all fitness levels. Whether you are just starting to workout or a seasoned workout regular. These stretch band set can be integrated seamlessly with every popular workout program including general exercise, stretching, yoga, pilates, and more. New In Box *prudentplum is run from a non-smoking, pet free home. Inventory is sourced from various places. If you are sensitive or have allergies please ask any questions before purchasing