Name: Mark Verber
Age: 42
Gender: Male
Height: 5'10" (1.8 m)
Weight: 180 lb (81 kg)
Shoe Size: 10.5 US (44 Europe)
Email: 
Region: San Francisco Bay Area, CA
Date: September 04, 2005 [Minor Update jan 2008]
Review Item: Inov-8 310 Flyroc
Manufacturer URL: http://www.inov-8.com/
Manufacture Year: 2005
Size: 10.5 US (44 Europe)
Listed weight: 11 oz (310g) / shoe
Weight as delivered: 24oz (680 g) / pair
MSRP: US$90
Super light trail running shoe. Mesh uppers. Aggressive tread. A core design feature of this shoe is extreme flexibility of the shoe. The sole is stiff from the heel to the metatarsals, but after that the sole is very flexible. It is possible to fold the toe all the way back to the heel. Some people have described the Inov-8 as a "slipper" version of the Montrail Vitesse. Limited cushion for the heel, almost no cushion for the mid-foot or fore-foot. These shoes have a very roomy toe box, a narrow body, a good heel cup, and a high lacing system which kept my heel anchored.
I have used these shoes for approximately 6000 miles (12 pairs of shoes) for light weight backpacking, trail running, snowshoeing, and general around town use. Streets in Mountain View, CA. Hard pack trails in the Santa Cruz mountains. In the Sierras which included crumbly trails, hard pack trails, granite, wet granite, muck, and snow. Coastal locations such as Pt Reyes which included hard pack trails and sand. In southern Utah on hard pack and sandstone.
The best example of this shoes performance was a trip I took to Hetch Hetchy and Yosemite valley. I covered 21 miles backpacking (carrying 18lb) first day including 5000ft gain, 4000ft lose. Around 9 miles in I soaked my feet wading through a marshy/muddy area and I only had one pair of clean socks which I was reserving to sleep in. So the next 13 miles my feet were in wet, muddy socks while I went up and down around 4000ft including some snow walking. The second day including 7 miles worth of backpacking, and then 7 miles of trail running. At the end of the second day, no blisters, no foot pain except for something unrelated to the shoes performance. [On the first day I got a splinter in my heel when my shoes were off, and didn't realize it. By the second day it was slightly infected and felt and looked a bit like a blister until I was able to clean it up and treat it.]
The soles are very flexible and very thin in the front of the shoe. I was able to "feel" the trail more wearing the 310 than any other shoe I have worn. The combination of the lack of padding and the extra flexibility has taken a bit of time to get used to. I have noticed more "pressure" / "shock" in my heel and the ball of my foot compares to my light hiking shoes or any other trail runners I have worn. Initially I was concerned that I might bruise the bottom of my feet, but hasn't presented any problems to date. I found that the sole was protective enough that I can hop between jagged granite boulders without hurting my feet. I would describe using the Flyroc as the closest to going barefoot, while still protecting your foot sole from bruising, and having better traction. I would not recommend the Flyroc for anyone who needs motion control.
I was very impressed with the traction of the Flyroc. So far I have used the
shoes on streets, hard pack trails, sandy trails, granite, wet granite, muck, snow,
and sand. The only time I have any issues slipping was slimy/wet granite,
wet/oily asphalt and
when I was walking on a very slanted trail where some lateral stiffness would
have helped to bite into the side of the hill. I was particularly impressed with
the ease I traveled over sand.
The added flexibility resulted in my metatarsals getting much more of a workout
than when wearing a more traditional shoe or sandal. The first few months using
these shoes I would notice that my feet felt different during the first few
miles of any trip. Not "bad", just "different". After around 5 miles I stop noticing my feet. If I stop and think
about how my feet were feeling, I realize that they are in general feeling better
than they have in the past. I think this is because the extra flexibility
permits a more natural stride and the shoes are lighter than nearly everything else I
have worn. Initially my feet were a bit more tired at the end of the
day and some muscles which don't normally feel tired were sore (specially my
calf muscles). After a number of weeks the extra tiredness
was gone and I
found myself really enjoying the extra lightness and the great trail feel. I
would bet if you regularly go barefoot that the transition might be much faster. The one exception
to these shoes feeling great is when I am carrying significant weight.
On a trip in May, 2005 I ended up carrying 50-60 lbs for a couple of miles to help out a
friend. [Turns out the Six Moon Design Comet can be turned into a front
pack letting you carry someone's pack on your back :-)] After just two miles I could tell
my feet got a workout.
After a month of use, my feet aren't getting tired now for two reasons. First, I believe my feet and leg muscles are getting stronger. Second, I stopped doing things which were not taxing when wearing more traditional shoes, but stressed my feet in the Inov-8 310s. For example, I have a tendency to sit on my haunches in a crouching position, with my bum on the back of the shoes, heels off the ground. Why do I do this? I have no idea. With a stiff shoe I can stay in the position for an extended period of time without taxing my feet. In a shoe as flexible as the Flyroc I start to notice my feet are being stressed within a few minutes.
The uppers are mostly mesh which ventilated well and dries reasonably quickly. For example, when I compare
the Flyroc to the Solomon XA Comp2, the Flyroc is almost as cool / air permeable
as Solomon XA Comp, faster drying, and more water resistant. I was able to run
for a couple of hours in light rain and my feet stayed mostly dry. Note: once
the Flyroc has been soaked or mucked up they no longer seem to be water
resistant, rather they seem to wick water in. The down sides of the mesh are
that it gets torn up more quickly that many other materials, my feet and socks
get quite dirty through the mesh, and that thorns, small sticks, etc can get embedded
in the mesh.
Best of all for me... few to no blisters. I switched to trail runners and Wright DoubleSocks and few years ago and have come to expect not getting blisters in
common locations like my heel or the sides of my feet, the ball of my foot,
etc... but I would still get blisters between some of my toes which are crooked
and bump into their neighbor (I have hammertoes and morton's toes). The Flyroc shoes are the
first shoes I have worn that have significantly reduced blisters I get
between my crooked toes. Later I switched from Wright DoubleSocks
to the Inov-8 Mudsoc. I have found that the Mudsoc is a bit more comfortable,
providing just the right about of cushion for me, but it takes longer to dry.
Since I switched to the coolmax
Injinji Tetratsok I
have not had a blister.
I am now on my 12 pair of Flyroc-310. I seem to get around 500 miles out of them. After 500 miles the lugs under the balls of my feet are mostly gone and the mesh is typical torn up and looking pretty ratty, and the slight shock absorption is gone. I used to get nearly twice the wear from my New Balance 801 AT. While I would love these shoes to be more durable, I will willing to replace these shoes more frequently to the performance I am getting from them.
This is a shoe for people who want to be able to feel the trail under their feet. I think that having the front and rear of your foot free to supinate/pronate and flex / extend freely is important to go fast on rough ground. People who want more insulation from the trail will probably prefer other shoes that restrict these motions more. Likewise people who need arch support, and need to control pronation will want a stiffer shoe.
I think it's interesting to note the number of adventure, fell, ultra-distant races / records have been won using Inov-8 shoes. Especially when you realized that this company has only been shipping shoes since 2003. See Inov-8 in the News. You should also check out backpackinglight.com's Footwear Trends which features Inov-8.
Mudclaw-270: Didn't work as well for me as the Flyroc, but I don't remember the specifics and have lost my notes.
Terroc-330: I have been surprised with how 20 grams changes the feel of the shoe. When I bend the 310 and the 330 with my hands, they seem similarly flexible. On the feet though, there is a noticeable difference, with the 330 being clearly stiffer than the 310. If you are looking for a light weight shoe which has a fair amount of trail feel, but you don't want to go to an extreme, you might want to give the 330 a try.
Flyroc-345 GTX: Identical to the Flyroc except uses Gore-Tex uppers rather than mesh. Shoe is a bit stiffer with the switch from mesh uppers. I prefer the Flyroc-310 with a waterproof sock in cold weather to the 345.
I did a lot of backpacking from 1972 until the mid '80s. During this time I hiked sections of the AT (approximately 1/3 completed), spent a significant amount of time backpacking in the Rockies (Rocky Mountain, Yellowstone, Tetons, Glacier National Parks), and frequented Red River Gorge and various destinations in Canada. In the '90s my outdoor activities slowed down to make room for other aspects of life. Nearly all my backpacking was heavy-weight style. In 2001 I started seriously backpacking again... mostly in the Sierras. Over the next three years I switch from a heavyweight to ultralight to lightweight style. My three season base weight is now 8-13 lb (3.5-5 kg). Full carry weight including food and water is typically 15-30 lb (7-13 kg) depending on the length of the trip. Winter trips are more like 18 lb (8 kg) base weight.