Since temperatures in Sri Lanka are generally on the higher on side for most of the year, you are encouraged to wear casual clothes when touring most regions of the country. T-shirts, Jeans and Shorts are the ideal choice as you would always want to feel cool and comfortable. If you are exploring the hill country it is best if you have with you woolen clothing to protect you from the chilly environment. Sweaters, Pull-Overs and Cotton Trousers are the order of the day. Sandals, Slippers and Shoes would cap it all off. Also choosing light colored clothing will reduce the heat intake during the day.