At 330 grams who has time to quibble and call these heavy? True, INOV-8 is making lighter-cushier models these days, but this is still my staple shoe for its ability to excell in any and all conditions. Made for a neutral runner or supinators like me. Firm and responsive underfoot with excellent traction on O'ahu's MUD, roots and rocks. Also work well on the road if necessary. In comparison the newer models e.g. roclites are more nimble and do well in the mud during the first weeks of use. My issue with the newer models is primarly a distinct lack of traction on wet surfaces, namely stream beds and rocks and roots in the rainforest, where I do 90% of my trail running. The Terroc 330s rubber is superior for this environment in that it is much softer, more porous and thus stickier. Which lends it self well to quick travel trough the tropical climate. All non-Gortex models drain well, an essential component here in the islands. I also use the Terrocs for fast packing and hiking trips with pack weight around 20#. The older INOV-8s with solely the "Metaflex" outsole (Terrocs, Flyrocs, etc.) tend to fit true to size for me. The newer outsoles with the "Fascia Band" (roclites etc.) require that I upsize 10.5 to 11. Try a pair of INOV-8s and you will see why the other big names are all trying to come out with light weight trail runner.