These sporty shoes feel very comfortable and light on your feet. The PU reinforcement on the toes and heels brings extra protection. OrthoLite insole is very light and lets the air flow through it. The shoes are equipped with 13 carbide steel studs which perform differently in various surfaces. On the soft ground the studs will go into the ground, on a hard surface the studs will partly retract into the rubber sole and the grip comes mainly from the rubber sole. On a hard and uneven surface, like when walking on the rocks, the grip is coming partly from the studs and partly from the rubber sole.Nordic last.Niwas are an environmentally friendly option:- The surface is made from 100% recycled polyester rip-stop nylon, which is produced following the Bluesign -standard production methods. This standard emphasises reducing the environmental impact by cutting down the air and water pollution. Bluesign approved prodcuts are also scientifically proven to be safer to produce and use. The fabric is dyed using Solution Dye technique, which consumes less water and energy than the more traditional methods.- The fleece lining is made from recycled polyester, which is also made according to the Bluesign -standard using Solution Dye -technique.- OrthoLite Hybrid™ -insoles use 15% production waste foam and 5% recycled rubber. Also the upper fabric of the insole is made using Solution Dye technology and recycled polyester. They too fulfil the Bluesign -standard requirements. You can wash the insole in the washing machine in gentle cycle and low temperature water.Studded shoes are not meant to be used indoors. Special caution must be exercised when walking on floors made from soft materials, such as on wood floors.