The WillowWood One® System provides transtibial amputees with advanced socket technology. Designed for use with suction suspension, delivering an airtight seal, internal sleeve, and socket security. The system moves with an amputee's residual limb for reliable suspension and comfort. Developed and designed for patients who comment about lack of suspension or insecurity with their current prostheses and would potentially benefit from better limb health. Ideal candidates for this system have a residual limb that is 5 inches or longer Features two seal points ensuring airtight seal does not break The Alpha Duo® Liner, One Gel Sock, and the pre-flexed One Sleeve are part of the system and also available separately Fabrication NOT included Suction System Kit Includes: Fabricated Socket: If a definitive socket for the system HAS BEEN fabricated, the trial period is 30 days from the socket ship date from WillowWood®. A credit will be issued for the WillowWood One® System components, less a non-refundable fabrication service fee.*Only applies if WillowWood will be fabricating the definitive socket. Non-Fabricated: If a definitive socket has NOT been fabricated, the trial period is 30 days from invoice date and you are eligible for a full credit. Definitive Socket: 2 months from date of invoice (only if WillowWood fabricates the definitive socket) Sleeve: 3 months from invoice date Liner, Gel Sock, & Seal: 12 months from date of invoice LimbLogic® Pump: 24 months from invoice date One Link One Sleeve One Gel Sock Alpha Duo® Liner