Make the Thermoball™ Gilet your go-to layer for high-energy hikes this winter. Lightweight Thermoball™ insulation traps body heat in key areas to keep you cosy in seriously cold conditions. It’s just as compressible as down yet insulates even when wet, & even stows in its own pocket when you don’t need it. A hem cinch cord helps lock in extra warmth, & with a sleeveless design, you benefit from core coverage & maximum arm mobility – great for scrambling over boulders.