The Damson Madder Lois double collar blouse is effortlessly stylish, featuring puff sleeves, a floral print, and a single popper fastening at the neck. The Damson Madder Lois double collar blouse is effortlessly stylish, featuring puff sleeves, a floral print, and a single popper fastening at the neck. Damson Madder was born out of a desire to make exciting designs, responsibly. From their North London studio, they craft playful, ultra-feminine designs meant to be worn again, and again (and again!). Think maximal style, minimal impact.