What makes camping gear hot or cold resistant?

Camping gear is designed to be hot or cold resistant through the use of specialized materials and insulation techniques. For hot resistance, gear often incorporates reflective surfaces and breathable fabrics that wick moisture away, helping to keep the user cool. Cold resistance is achieved through insulation materials like down or synthetic fibers that trap heat, along with waterproof and windproof outer layers to protect against harsh conditions. Additionally, gear is often tested for durability and thermal performance to ensure it can withstand extreme temperatures.