The Wooler Houdi is a techy 100% merino version of Houdini's classic layering staple. Made from Wooler GridMerino™, an innovative weaving pattern that creates a grid like structure allowing increased air flow to regulate temps and adding some extra cushiness to boot. The Wooler Houdi is truly a year-round garment, given merino's inherent temperature regulating properties. Layer it over a base-layer and under a parka for winter hikes and ski trips or throw it on over a tee in the fall and spring.