The Scarpa Women"s Baltoro GTX is a replacement for the classic ZG65, the new Baltoro combines the lightweight elements of the Zero Gravity range with Activ Fit to produce our most comfortable lightweight boot yet!The Baltoro features our cutting edge Activ Fit technology to ensure high levels of out of the box comfort with little or no breaking in period required. The AutoFit collar and Heel Tension system ensure a comfortable precise fit around the heel giving you optimum levels of support on uneven terrain whilst the Speed Lacing System and new MBE last ensure a precise comfortable fit across the forefoot. The Baltoro uses a Fabric and Suede upper to help reduce weight whilst maintaining support and features a Gore-Tex XCR membrane which helps to boost breathability in warmer climates.All of this is topped off with a Vibram outsole which provides high levels of underfoot grip on a variety of surfaces and an Italian made PU midsole with EVA heel insert which provides great underfoot cushioning.