The Kepler Liner Beanie sits squarely in that niche between intolerable brain freeze and “I need to take this hat off before I boil to death.” Made from naturally warm, breathable and temperature-regulating merino wool, it provides a thin layer off warmth that stays comfortable even as your heart rate rises.

Superfine (17.5) micron merino wool has a high warmth to weight ratio without the bulk of other materials, allowing it to squeeze into the smallest of pockets when you need to take it off. Combined with the low-profile design (a panelled fit and flat-lock seams), the Liner Beanie fits neatly and comfortably under your climbing or cycling helmet. We’ve also used a double-layered headband to stop your ears from getting chilly – always the first casualties.

The beanie’s non-mulesed merino wool is blended with a small amount nylon and spandex using a process called ‘corespun’. Corespun merino is made by wrapping merino wool fibres around a central thread of nylon and spandex. This gives the Kepler Liner beanie more stretch for a better fit and extra durability to withstand the usual outdoor use and abuse.