There can be several reasons why people wear long sleeve shirts and pants on hot summer days:
Sun protection: Long sleeves and pants provide a physical barrier between the skin and the sun's rays, offering protection against harmful ultraviolet (UV) radiation. This can help prevent sunburn, reduce the risk of skin cancer, and keep the skin cooler.
Insect protection: Wearing long clothing can act as a deterrent against insects like mosquitoes, ticks, and flies, which are more prevalent during the summer months. It helps to minimize the exposed skin area, reducing the chances of bug bites and potential diseases they may carry.
Personal preference: Some individuals may simply feel more comfortable wearing long sleeves and pants, regardless of the weather. They might have personal style preferences or cultural reasons for choosing these types of clothing.
Cooling effect: In certain climates, wearing loose-fitting, lightweight, and breathable long sleeves and pants made from natural fabrics like cotton or linen can actually help keep the body cooler. This is because the fabric provides a barrier against direct sunlight while allowing air circulation, which can create a cooling effect through evaporation of sweat.
Work requirements: Certain occupations or activities, such as outdoor jobs, sports, or gardening, may require individuals to wear long sleeves and pants for safety reasons or to adhere to specific dress codes.
It's important to note that while long sleeves and pants can offer benefits in specific situations, people should also consider staying hydrated, seeking shade when necessary, and using appropriate sun protection measures such as sunscreen, hats, and sunglasses to maintain overall well-being in hot weather conditions.