Customizable Support for a Secure, Efficient Fit Premium S-PHYRE supportive foam insoles use layered construction and an adjustable ARCHSYNCH support to create a secure, customizable interface for efficient pedaling Features Adaptive Support: Layered construction with a supple top layer molds to the foot for a secure, comfortable fit and efficient pedaling Adjustable Arch: The position of the ARCHSYNCH adjustable pad can be fine-tuned to match the arch alignment of each foot Trim to Fit: Insoles are made to be trimmed to fit and are compatible with SHIMANO DYNALAST AND SHIMANO DYNALAST 2.0 shoes Precise Fit: Available in mulitple size ranges: 36-37.5, 38-39.5, 40-41.5, 42-43.5, 44-45.5, 46-47.5, 48-50