Upper material Microfibre & wear-resistant fabric Reflector inserts on heels Lining GORE-TEX " Performance Comfort Footwear" membrane Reinforcements Ankle reinforcement, PU shift reinforcement, shin, toe & heel reinforcement Fastener Elastic zipper for easier access + wide velcro strap Insole Ortholite® footbed with long-term cushioning & high air permeability Sole Touring sole with different grip ranges Gore-Tex® membrane This fine material has important features such as long-term waterproofing, excellent resistance to the most extreme temperatures & high wear resistance. The special microporous structure of the GORE-TEX fabric, made from expanded PTFE, contains around 1.4 billion microscopic pores per square centimeter. These pores are Approx. 20, 000 times smaller than a drop of water, but 700 times larger than a molecule of water vapor. While water cannot penetrate the GORE-TEX membrane in liquid form, perspiration (water vapor) can easily evaporate. The result is a completely waterproof barrier that means the shoe can be used in all climates & guarantees maximum comfort & optimal breathability. Ortholite® foot bed Experience the comfort of the foot beds made with Ortho Lite® PU foam. Long-term cushioning: Ortho Lite® foam compresses less than 5% of its thickness over the lifetime of the footbed, so the cushioning, fit, comfort & performance never change. High level breathability: the open-cells of the Ortho Lite® foam, allows air to circulate in & around the footbed, moving the moisture away & keeping the foot cooler & drier.