This is a good boot for classic rollerskiing for those who are more beginner, as the combi offers more ankle support than low cut classic boots. We don't recommend combi boots for skate rollerskiing as we recommend a skate boot for better support. 

NNN outsole. Let us know if you want us to measure the inside length before ordering to help ensure good fit with first try. Fit is same as Alpina for sizing. Width about same as Alpina RCO. We like the foot bed of the Spine Combi better than the Alpina RCO. Same flex as the Alpina RCO boot.