Baseball caps are soft hats that should fit perfectly on your head. They have a stiff bill or a peak that protrudes from the front. Used for protecting a player's head from the heat during daytime and outdoor games, it also shields their eyes against glare so they can maintain proper vision even under intense sunlight or bright stadium lights for evening games.

Technology has caught up with baseball caps these days. Caps now are designed to keep the head cool using evaporative cooling technology. This is important especially on those lazy, hazy summer days during baseball games as well as baseball drills. Evaporative cooling technology helps keep the player cool in the sun so his concentration is greater and he has less stress. A player with his head in the game is as good as gold. A moment's distraction is all it takes to miss a grounder or a pop fly.

This cooling effect is also important when wearing batting helmets. Batting helmets are worn when a player is at bat and at anytime that they are on base. This is for safety reasons and stems from an injury sustained by Tony Conigliaro many years ago before helmets were required in the MLB. He was hit in the head by a pitched ball and was severely injured. During baseball training, the baseball cap is worn under the helmet for a couple of reasons. One is to keep the player cool and focused. The other reason is to keep the helmet steady on the head.