Thorogood Unisex The Deuce Polyurethane Insoles Review June 7, 2018 No Comments Polyurethane Made of polyurethane Dual-density For work boots Outstanding cushioning Shock absorption This dual-density polyurethane insole is our best selling insole for work boots, providing outstanding cushioning and shock absorption. Tags: Health & Household, Health Care, Inserts & Insoles, Insoles, Thorogood