With the Altosphere Vest, we set out to make the lightest and most advanced 2-layer cycling shell possible. Designed for high-output activities, the shell utilizes an ultralight stretch textile with a waterproof membrane and features un-taped seams for freedom of movement and increased air permeability.

For the main body fabric, we landed on Zero Wind® by Pidigi. With 70 years of continual research and fabric innovation, Pidigi is a powerhouse, and the Italian made Zero Wind® fabric is close to perfect. Coming in at an absurdly light 53 gm/m2 this two-layer fabric is a formidable barrier against wind and rain. The smart membrane is both waterproof and hydrophilic so that sweat wicks away from the body but outside water is repelled and the more intense the physical activity the more breathable the membrane becomes. For improved water resistance, the shell is treated with BIO-WR Technology which is a non-fluorinated ecological DWR water and soil repellent.