Improved resistance bands: Our fitness band is made of environmentally-friendly, durable and tear-resistant rubber. They are environmentally friendly and durable. The handle has been extended to 14.5 cm to ensure more slip resistance and sweat absorption. The foam of the protective cover is thickened to 0.5 cm to protect the resistance bands from damage. Improved thickened stainless steel carabiner makes the accessories stronger and less fragile.