The "sarong" is the popular garment worn mostly by Muslim men, notably in Java, Bali, Sumatra and Kalimantan. It is a large tube or length of fabric, often wrapped around the waist. The fabric often has woven plaid or checkered patterns, or brightly colored by means of batik or ikat dyeing. Many modern sarongs have printed designs, often depicting animals or plants. It is mostly worn as a casual wear but often worn during the congregational prayers as well. The "baju koko", also known as "baju takwa", is a traditional Malay-Indonesian Muslim shirt for men, worn usually during the formal religious occasions, such as Idul Fitr festival or Friday prayers. It is often worn with the sarong and peci.