Air-Cushion Stick - This patented air-cushioned massage head is very versatile and designed to fit many users and body areas. This tip is ideal for users who prefer a softer massage pressure. It is also perfect for massaging between sensitive joint areas such as scapula, knees, shoulder joints and ankles. This tip will also provide great relief to loved ones who suffer from bed sores due to hospitalization. The patented air-cushion stick allows you to massage areas that most massagers wouldn't, such as elbows, knees, hands and feet. Use Pure Wave to shorten muscle recovery time and increase well being.