Sizing advice is the same for both shoes. Because of the cramped toe box, I go 1/2 size up to get adequate width in the toe area. This was my same sizing for the Metcon 5. As such they are tiny bit long, but I’d rather have shoes that are slightly too long than slightly too narrow. Both shoes have the same rope wrap (the part where that tough rubber outsole wraps up around the midfoot of the shoe). Shape, sizing, are unchanged.

THe NIke Metcon 6 looks good and carries forward all my favorite parts of the Nike Metcon 5. The breathable upper is a nice change too – I workout in Florida – in a garage with no A/C. The biggest change has come in the form of a much superior and breathable upper, made with large ventilation holes to increase airflow and also give a much lighter feel on the foot.Here’s a closeup of the upper on the Nike Metcon 5. It’s a dual layer material with 3d haptic print on top for durability. It wasn’t bad, but it’s definitely not breathable like the Metcon 6.

What’s different in the Nike Metcon 6 as compared to the Metcon 5? Not much. The upper is the real difference. Why? Because just like it’s predecessor (the Nike Metcon 5) it’s a bit tight and cramped up in the toe area. The launch colorway of leopard print (women’s sizes), camo print (men’s sizes) and a dark Mat Fraser special edition was not to my taste at all. Well, it’s the same shape and size as the prior shoe – so I’m recommending to go 1/2 size up to get comfort in the toe area.Stand out is the extended sole wrap, seam overlays in contrasting colors which divide the shoe into two very separate parts, and large zig-zag lace overlays The open ventilation holes are so large in fact that light travels through to create a shadow in on the insole. Compared to the Metcon 5, for me this felt much lighter and overall a more comfortable shoe. You might feel the narrowness of the Nike Metcon shoes after a long day – that’s where it bothered me the most (a long day walking or on your feet can leave your feet slightly swelled. From here you can see that the Nano X is taller, but more importantly – look at the toe area – it’s much wider. This is a very comfortable shoe for those with wider feet.

When lifting weights a training shoe like this feels a world away from a running shoe, and is much more comfortable and safer on the joints. The Metcon 6 gave plenty of support and structure under the heel, and enough room in the forefoot for the toes to move and give the feel of the floor through the whole foot. Beyond the upper, everything else is carried over unchanged from the Metcon 5. The all-rubber, flat, super grippy outsole is still there. Same shape, same diamond wide heel, flex grooves, etc.Changes in the heel are cosmetic only. The 6 has the big Metcon M and a different texture, but the TPU heel clip and relatively low collar are still present.