The upper materials have been updated to a super soft and airy textile, so light and smooth it feels like being barefoot. The water pickup is minimal, the drainage is excellent and hence the wet weight is almost as low as when it’s dry. The midsole is very flexible and keeps the weight down. The height of the heel cup is slightly reduced in order to reduce pressure at the Achilles tendon. Terrain feel is remarkable thanks to the low profile of the sole.
Merrell, a well-respected brand in the world of off-road running, hiking, and water sports, makes its first foray into mud runs with their Tough Mudder All Out Crush. We got our hands (feet) on a pair of the TM-branded ones and the standard red model, and put them through their paces.
I've been testing the Icebug Zeal since December 3, and after a month or so of only seeing photos I was really excited to get my feet into 'em. I'll use the term "into" quite literally, as the radical midsole design envelops most of your foot, designed for lateral stability and an overall low 6mm drop from heel to toe.