Keen Utility K-30 Low Arch Insole Sizes:M 150D Poly Oxford waterproof and

150D Poly Oxford waterproof and breathable fabric with 5000 / 5000 protection with water repellent finish

Two lower-front flap pockets with side zip entry

Compatible with 3M™ TR-600 and TR-800 powered air and Dual Airline supplied air systems against a variety of gases

shock-absorbing pads and a full-length layer of high-rebound foam help fight foot fatigue for long days on your feet

Keen Utility K-30 Low Arch Insole Sizes:M 150D Poly Oxford waterproof andThe perfect choice for shock absorbing comfort when minimal underfoot arch support is needed. High rebound foam reduces foot fatigue. Men's sizes: Small = 6. 5 8, Medium = 8. 5 10, Large = 10. 5 12, X Large = 12. 5 14 Ladies sizes: Small = 8 9. 5, Medium = 10 11. 5 Cleansport NXT for natural odor control Deep heel cup to align and center foot Designed for low arches Dynamic arch support High rebound foam Quick dry performance technology Shock