Nathan Peak Hydration Belt - 80190 birkenstock then the Birkenstock Blue Heeled

then the Birkenstock Blue Heeled Footbed Insoles are the answer

A new SpringRamp forefoot design works with the midsole to increase forward momentum

The specially designed heel flexes and springs back for easy entry

No-bounce pockets provide plenty of storage

Easy to store Power mesh pocket with fold over construction allows you to securely store almost any size of smart phone

Nathan Peak Hydration Belt - 80190 birkenstock then the Birkenstock Blue HeeledKeep this SpeedDraw™ Flask close at hand and in place with this lightweight Waist Pak featuring an angled insulated bottle holder. Features: 18 oz 535 mL Ergological™ SpeedDraw Flask with Push Pull cap Angled, insulated bottle holder allows easy one handed access and bounce free ride Extended side panels hug the body comfortably for a perfect fit Expandable zippered stretch pocket keeps essentials protected External shock cord system for