What is a 4 seasons sleeping bag?

Whether you're backpacking through alpine trails, car camping under starry skies, or braving sub-zero expeditions, the right sleeping bag is your key to comfort and survival in the wilderness. Modern sleeping bags combine cutting-edge technology with ergonomic designs to adapt to every climate and adventure style.

What is a 4-Season Sleeping Bag? Your Complete Guide
A 4-season sleeping bag (also called an expedition sleeping bag) is a high-performance outdoor gear designed to withstand extreme weather conditions year-round, including sub-zero temperatures, heavy snowfall, and high-altitude environments. Unlike 3-season bags optimized for spring to fall use, 4-season models prioritize maximum insulation, durability, and weather resistance for survival in harsh climates.

Key Features of 4-Season Sleeping Bags

✅ Extreme Temperature Ratings
Rated for -30°F to +20°F (-34°C to -6°C) using EN/ISO 23537 testing standards, these bags use 650–900+ fill power goose down or synthetic insulation (e.g., PrimaLoft® Gold) to retain heat in freezing conditions.
✅ Weatherproof Construction
Hydrophobic down or moisture-resistant synthetic fibers prevent insulation clumping in wet/snowy environments.
20D–30D ripstop nylon shells with DWR (Durable Water Repellent) coatings block wind, snow, and light rain.
Fully insulated hoods and draft collars seal body heat around the neck and head.
✅ Rugged Design Enhancements
Reinforced seams and double-layered footboxes resist wear in abrasive conditions.
Extra width/length for layering with thermal clothing.

About Mettal
Yangzhou Mettal Travel Products Co., Ltd. is a professional and experienced company for outdoor sports inChina. We have fuly covered equipment for outdoor activities such as functional backpacks, tents, sleeping bagsand so on.
After 15 years' growth, customers from all over the world have experienced our best services, once the vendorbuyer relationship being set up , that may mean a fortune gate has opened for your company. Welcome to MettalCorporation!

Media Contact:
Lewis | linda@mettay.com | 18021715220