I'm exploring my options in boots for R-day. I have the Khybers and they are okay, but not the best boot I've ever worn. I have some 310's that I haven't worn yet I might try. The Khybers "look cool" and they have a lot of "features" most of which seem unnecessary. My biggest issue is that they aren't waterproof (are any of our three options?). Also, while wearing them in stickers and stinging nettle I got poked through the tongue. The soles are also pretty hard on the heels after a few hours (this can be remedied with a new sole). Finally, I replaced the cheap faux paracord laces with speed laces. Now, I do think they are pretty comfortable, especially with regard to flex. Traction is also good. These might be the best boot out of our options. I'd like to try the other two though and/or get another opinion. Can anyone who has been through Beast/worn these boots extensively comment on this? Thanks.