Sitpack ZEN is a one-legged compact chair that fits in your bag and strengthens your core

We all like a good sit. The problem is chairs. Sometimes you don’t have one handy; or you spend hours sitting in a bad one, only to get the kind of back pain that suggests your spine wants to flee. Enter: Sitpack ZEN (£84). It’s essentially a bottom hammock on the end of a Y-frame attached to an extendable leg. Models weigh between 455g and 555g, collapse down to the size of a large drinks can, and are built from space-age materials like carbon fibre, aerospace-grade aluminium, tactical mesh, and Kevlar webbing. And if you sit or stand for long periods, you’ll love how Sitpack ZEN’s design improves your posture and back health – even if it looks like someone’s shoved a massive stick up your butt.