Superfeet Winter Support Insoles Trim to Fit the Birkenstock Birko Sport is

the Birkenstock Birko Sport is a unique approach to foot support that is loved by many

Helps support plantar fascia

They are made with 100% proprietary OOfoam that provides an incredible 37% more impact absorbing than any existing EVA foams

consisting of Plush VCT top foam layer and a durable/flexible EVA foam base

These slippers feature Spenco's Total Support EVA foam footbed with metatarsal pad and deep heel cup for the perfect level of comfort

Superfeet Winter Support Insoles Trim to Fit the Birkenstock Birko Sport isOverview The Superfeet Winter Support Insoles are designed to keep your feet both warm and supported during all of your favorite cold weather activities. Whether it's skiing or snowboarding, winter hiking, or even just a snowball fight, the Winter Support Insole's designed to keep your feet happy no matter the weather. With a shape that works in both ski snowboard boots and winter boots, these versatile winter insoles can be your go to insoles for the