Initial Impressions: Uninsulated Bean Boots in the Winter 。L.L.Bean Tek 2.5 Waterproof Winter Snow/Hiking Boots size Men’s 9 Medium. These mid-calf, lace-up boots are designed for winter activities like hiking and snow trekking. They feature Tek 2.5 technology for waterproofing and are insulated with PrimaLoft to provide warmth in cold conditions. Key Features: Waterproofing: Tek 2.5 membrane Insulation: PrimaLoft synthetic insulation Closure: Lace-up system with metal hardware Materials: Leather and textile upper with a durable rubber vamp and outsole for traction In extremely good used condition!