69SLAM #1 popular underwear, boxer shorts. Made of microfiber material that is smooth to the touch and is stretchy, so it feels like it is sticking to your skin. It is also quick drying and highly durable, so it can be used as an inner layer of surf pants. ABOUT 69SLAM: Born in 2004 in Bali. Available in over 45 countries! Vivid colors, stimulating patterns, and pure fun are all about 69SLAM. PLAY LOUD! For those who do not fear, regret and only have good vibrations.