Boots Season Year-Round? The Pull On Gusset Boot Is Here For It. With Trending Work Boot Styling, These Pairs Feature An Elastic Gusset For Easy On-And-Off. Shop Them In A Range Of Neutrals And Pastel Pops To Go With All Their Outfits.Lining: 95% Polyester, 5% Polyurethane Outsole: 100% Thermoplastic Rubber Upper: 70% Polyester, 30% Polyurethane .