As a Cairn subscriber we're eager to share all the ways Superfeet can help avid travelers, adventurers and explorers get more out of every day.

If you like your Superfeet FLEX, here are some other Superfeet insoles eligible for your exclusive Cairn 20% discount.

Use the code that came with this month's box to take advantage of this offer at checkout.

With 4mm thick Aerospring™ foam and flexible heel cradle, Superfeet FLEXmax insoles offer long-lasting comfort for most footwear. The Superfeet FLEX series of insoles offer an excellent introduction to the Superfeet experience.