I have put these shoes through absolute hell. Merrell Shoes are by far the toughest I have ever owned. I am a Merrell, and first bought a pair of mid hikers about 8 years ago mainly so I could wear my last name. I have only wore Merrell ever since. it was a warm day(60 deg F. or so) in Feb two years ago the I got my first Ventilators. when I stepped out of the local shop I immediately felt a nice cool breeze through out my feet. Nice! I was a bit worried about the strength of the vents. Well after a year and a half of mt.boarding, kite ground boarding and doing 20-30 foot beach jumps with my kite on sand mud hard pack and submerged in water. they are still my back up shoes. I now have another pair and plan to replace them with the mid height before leaving with my son (5) and brother on a 5 month trek to Costa Rica and back. There are many videos on my website proving the "ABSOLUTE HELL" that I put my Merrell footwear through on a day to day basis. PROPS TO MERRELL!!! I have Merrell's for all seasons.