Inclusion Criteria:  Over the age of 18 New transtibial amputation within the last 6 months Deemed ready to cast for a prosthesis by the clinical team as per usual care at the prosthetic centre Able to understand written English and provide informed consent  Exclusion Criteria:  Participants under the age of 18 Participants with an ankle disarticulation, Knee disarticulation or transfemoral amputation Body mass > 125 kg with a distal circumference of 23-34 cm (small socket) Body mass > 150 kg with a distal circumference of 30-45 cm (large socket) Residual limb longer than 27 cm Severe upper limb dysfunction (due to strength requirements to don the liner) Severe visual requirements (that would restrict the person's ability to monitor their residual limb) Contraindication to be fit for a prosthetic socket Recent cerebrovascular event (i.e., stroke, haemorrhage, brain injury) Disease affecting their memory Unwilling to trial the confidence socket system Unable to tolerate wearing a prosthetic liner due to excess sweating/ allergic reaction or other reasons