Partial Simulation Performance Tests - ISTA 2A tests are for packaged-products 150 lb. (68 kg) or less, and are a combination of basic test elements from ISTA 1A (Non-Simulation Integrity Performance Testing) and advanced test elements from ISTA 3A (General Simulation Performance Testing). Procedure 2A simulates some actual transport hazards such as temperature and humidity. An example would be to test desert-like conditions (60C and 15% RH), which are dry with low humidity, on a packaged-product.