Muay Thai kicks do not bother or has any effect on Burmese fighters. Letwei aka Burmese boxing is a close contact rough sport where headbutts & elbow strikes to the face & back of the head are legal. Letwei fighters don't kick that much. They rely on punches, head butting & elbow strikes. They rush right in to take away the effectiveness of the kicks & starts punching & pushes their opponent into the ropes to use their headbutt & elbow strikes. That's their stretegy.