100% fleece tube wrap hand-made to fit over a standard 6 foot BiPAP or CPAP hose. The tube wrap acts as insulation which has been shown to allow the hose to stay warmer when used with heated humidification. A warmer hose decreases the amount of condensation in the hose. An excess of condensation in can cause a condition called "rain out" where moisture builds up and can cause water to enter the mask and even be inhaled.
CPAP users have used tube wraps for years and have realized the benefits wrapping your hose can provide to prevent excess moisture.