- L'Essential, yellow ochre T-shirt for Men - Round neck, short sleeves - Flamed cotton, rolled edge collar finish - IKKS #actforbetter: material contains 100% Organically grown cotton L'Essential remains L'Essential. A short-sleeved, round-neck T-shirt in ultra-lightweight flamed organic cotton. An inimitable style, to be (re)discovered today in an exclusive ochre yellow color.