Men's Dewalt, Flex PT Work Boot. When you're on the clock, nothing beats the comfort and style of the DeWalt Flex PT Bison work boots. Made from full grain leather uppers with a Dri-Lex DL Aerospace mesh lining, these boots will keep your feet cool, dry and well protected all day long. Leather uppersLace up closure with 3/4 tongue gusset to keep out dirt and debrisPadded collar and tongue for supportAerospace mesh linings ProComfort footbed features ergonomic arch supportProComfort TPU shankEVA wedge soles are oil and slip resistant