Heat-resistant sole with a rubber compound that is resistant to 300°C and a glue that is resistant to 70° C. Heat activated glue WILL delaminate when exposed to fire or heat. (This delam is not covered under warranty.) • Designed for forest management work and post fire clean up work• Minimum 8 inch height on all boots meets federal standards for Wildland firefighting• This boot is NOT designed for front line firefighting• Compatible with various non-automatic and semi-automatic crampons. Crampon compatibility is NOT ensured, and boot-crampon compatibility needs to be inspected SPECS: ITEM: 11CSIZES: 37 - 48 (half sizes)WEIGHT: 32.10oz / 910gLAST: MakaluUPPER: 3mm Idro-Perwanger Roughout LeatherLINING: Dry-Best®INSOLE: 8mm MtnFlex with 1.5mm Dacromet-coated half steel shankMIDSOLE: PU AircushionSOLE: Vibram® Ice-New HRO Test and ISO 20344 Certified