actually, its funny that this post came up cause i was meaning to put something on here about this, recently i have been climbing with a pair of pumas, i bought them a while ago for stylish reasons but recently discovered the advantages of using them for climbing on pruning jobs or rec climbing, i used them for a weekend and ran around a big white oak and loved them, they are so good its like having spikes on because they are thin on the bottom of your foot so your natural arch helps hug the branches and there is very minimal slip, now ansi and osha require boots but ive always been a bit of a rule breaker, the way i see it is they require us to wear boots for our own safety but if wearing these shoes makes me more safe in a tree doesnt that just further along the message they are trying to get out, i dont know, i always thought that your own personal well being is, well, personal, but dont get me started on that, then ill get ranting on seatbelt tickets and what nots, but between you me and the other thousands of people that are going to read this, i prefer my pumas over my bulky boots any day (i always carry my climbing boots with me as well so that i can wear spikes for removals)