Cushioning & Fit: A Shock Absorbing Heel Pad Provides A Combination Of Cushioning And Optimum Feel While Standing All Day; Perforated Forefoot For Breathability Heel Stability: A Deep Heel Cup Centers And Aligns The Heel And Foot, Improving Alignment From Heel Strike, Through The Arch And Toe-Off For Better Stability Throughout Each Gait Anti-Odor Technology: Features Cleansport Nxt (A Trademark Of The Stewart Group); A Quick Drying, Natural, Probiotic-Based Technology Microbes Producing Enzymes That Break Down The Odor In Sweat And Help Prevent Footwear From Smelling Bad 90-Day Guarantee: Keen Utility Warrants The Quality And Comfort Of Its Insoles For 90 Days Note: Replacement Insole May Affect Protective Work Footwear Safety Ratings; Especially With Esd-Rated Footwear; Designed To Fit Keen Utility Boots Perfectly, But Can Be Trimmed To Fit Any Brand