Safe and soft - made from silicone rubber and covered with anti-dust surface oil makes it as soft as baby skin. No smell and no harm to human body.High quality material - these bands are made of premium durable and soft silicone, waterproof, elastic, lightweight and environment friendly. Prevents skin from irritation.It will be best choice for sport, exercise or yoga.Easy to install and remove - with the upgraded connector, you can change your beloved inspire hr bands easily, no extra tools needed.