Sometimes, personal protection equipment, such as wearing a work vest, or additional layers jackets or vest may be necessary for workplace safety. To keep workers safe on construction sites with poor lighting or high traffic, work vests frequently have reflective or hi-vis elements. Tradies working in mines, building sites, oil and gas, air and sea ports, warehouses, or other industrial settings frequently wear high-visibility work vests. For tradies women working outside or during the winter and rainy seasons, other work vests, such as puffer or waterproof varieties, may be necessary. When working in hot environments or throughout the summer, cooling vests may be necessary.