This #6 Bianco White Slip-On Boot is designed to wear on wet and greasy surfaces. Midsole is made from dual density polyurethane and consists of 5 mm deep tread to resist clogging. Outsole is made from nitrile rubber and offers good resistance to cuts, slips and hydrolysis. Heel of the boot consists of Comfroflex gel technology that absorbs heavy impacts and prevents fatigue. Comf2Bull footbed has a soft polyurethane construction and features gel inserts at critical strike points.