Calvus is a technical two-layer jacket that is 100 % waterproof in terms of both the materials used and its design. The fit is ergonomically cut for maximum ease of movement. There are two large pockets at the bottom, both of which have zips. The fit of the jacket can be adjusted from inside one of the pockets using an elastic drawstring. The right breast pocket has a flap for easy access. The left breast pocket and front opening have YKK Aquaguard® zips. The jacket also has a front button fastening that can be used instead of the zip to hold it closed. The cuffs are adjustable with velcro. The hood is also volume and width-adjustable, with both an elastic drawstring and velcro. There is a loop at the neck for securing a net. All logos on the jacket are reflective. PFC-free water-repellent finish.