Galvin green dyson insula with the addition of the new galvin green insula technology the dyson insula is ideal for warmth and layering on chilly days the galvin green insula brand is so popular world wide that the ranges have had to be expanded to meet growing demand exclusive to galvin green the insula fabric which originates from italian designers produces unmatched thermal properties and ultra breathability the dyson insula features a half zip sleeveless design in four colours two c