冬季保暖“三件套”这样选

Group 1: Down Jacket Market Insights - The upcoming "Great Cold" solar term has led to a surge in down jacket sales, with consumer concerns raised over a brand's jacket priced over 2000 yuan containing only 86 grams of down filling [1] - Experts emphasize the importance of checking down content and avoiding misleading marketing practices by manufacturers [2][4] Group 2: Down Jacket Quality Standards - The new national standard GB/T 14272—2021 specifies that only four types of natural down are allowed as filling: white goose down, gray goose down, white duck down, and gray duck down [2] - A qualified down jacket must have a down content of at least 50%, with recommendations to choose jackets with a down content of 80% or higher for better insulation [2] - Recommended filling weights vary: short jackets should have 120-300 grams, long jackets 200-420 grams, with an additional 20%-30% for extremely cold regions [2] Group 3: Down Jacket Selection Tips - Consumers can verify down jacket quality through tactile tests: pressing for rebound speed, checking for down leakage, and feeling for softness of the down [4] - Important to check the care label for compliance with GB/T 14272—2021 and ensure clear labeling of filling type and content [4] Group 4: Thermal Underwear Insights - The concept of "self-heating" thermal underwear is debunked; actual warmth comes from materials that retain heat [6] - Three main principles of thermal underwear include static insulation, dynamic heat retention, and reflective insulation [6] Group 5: Thermal Underwear Material Considerations - Consumers should prioritize materials like cashmere, wool, and acrylic for warmth, while also considering moisture-wicking properties [7] - Recommended standards for thermal underwear include GB 18401—2010 for safety and FZ/T 73022—2019 for thermal efficiency [7] Group 6: Insulated Cup Material Standards - Insulated cups are primarily made from various grades of stainless steel, with 304 being the most common food-grade material [9] - 201 stainless steel is less suitable for food contact due to higher manganese content, posing health risks [9] - Higher grades like 316 and 316L offer better corrosion resistance but at a higher cost [9] Group 7: Insulated Cup Selection Guidelines - Consumers should choose insulated cups that meet GB 4806.9—2023 standards and check for smooth, scratch-free interiors to ensure safety and longevity [10] - Recommendations include avoiding prolonged storage of acidic beverages in stainless steel cups and using gentle cleaning methods [10]