lots of flex in these boots, super soft, so you move front and back more, which helps cushion the shin bang. There are a number of ways to make it feel better, like tighten up like normal, then back off a buckle, replace your power strap with a Booster Strap, or get new liners with more front padding. Getting you boots in to a bootfitter is a good idea too, because they can set them to be able to move the best with your style and skill level.

Lincoln, try going to your local shop and putting on a pair to see how they fit with your wide feet. On Thursday after class.

Dude... this boot doesn't have a customizable flex. It's a 100, and that's it. You can alter other things in it like lean and cant, but not flex.

Sorry man, took a better look at my buddy's, and I'm pretty sure it's just an allen key.

I am unaware of any difference. The Kaos appears to have the same liner. The only major difference for the average park jibber is the padded toe box in the Pro. (You can make your own for the Kaos with some adhesive padding)

I think this guy is confused on the names, but I don't know the info so take this with some salt:according to salomons site, the kaos are rated at 3600, the spk's (Pros?) are heavier at like 4600, exact weight i have no idea... i know the spk's seem to be more forgiving with a flex index at 110, unlike the kaos which is at 100, the spk (Pro?) has a extra toe absorber as well... you get more for your buck with the spk (Pro?) but in essence they are the same boot... if your worried about weight the kaos, if your worried about movement and such, then spk but in relation to each other they are about the same boot