Even on the coldest winter days, you can still reconnect with nature in the ECCO ULT-TRN, a Scandinavian take on the classic leather hiking boot. With 400g PrimaLoft® Bio™ insulation and the PFC-free waterproof membrane, your feet will stay warm and dry when you hit the trails.—Modern, lighter look with a mix of full grain and nubuck leathers made in ECCO's gold-rated tanneries, combined with premium textiles—Ultra-warm 400g PrimaLoft® Bio™ insulation, which is biodegradable and made from 100 per cent recycled materials, keeps feet warm even in colder temperatures—PFC-free waterproof membrane keeps your feet dry—Shank provides the additional stability you need on the trails—Soft, ultra-light PHORENE™ midsole for bounce and energy return—Innovative, distinctive outsole with Michelin rubber, multi-directional grooves and two distinct zones for grip, durability and support