Size Guide
Measure your foot, answer three questions, and we will tell you which ASTRA size to order. Every style comes with the Flex Fit Pack, so the fit is adjustable once it arrives.
One shoe. Multiple fits.
Every pair of ASTRA comes with the Flex Fit Pack, so the shoe is set up around the foot instead of the other way round. Mix and match the footbeds until the room is right.
Standard fit
Start with all three layers for a balanced, supportive fit. The contoured insole supports your arch, while the additional footbeds provide cushioning and a secure feel from heel to toe.
Roomy Fit
Want a little more breathing room? Remove one footbed to increase the space inside the shoe, giving your foot extra depth without losing the support of the Arch Support Insole.
Wide Fit
Need maximum space? Remove both footbeds to open up the shoe and create additional depth and room for wider feet, while keeping the contoured arch support in place.
Orthotics and braces
Your left and right feet can need different things. Adjust each shoe independently by changing the footbed layers to give each foot the space and support it needs.
