Shorter CPAP tubes designed specifically for CPAP masks. Composed with lightweight material and equipped with a swivel feature, the short tube is the direct link from mask to CPAP tubing. It is designed with a 360 degree swivel to assist in smooth transition in bed for those of you who turn frequently through out the night. Not all masks are designed with short tube. Be sure to read the product description to ensure compatibility. It is recommended to replace the short tube every 3-6 months.