Custom Premium Men’s 100% Polyester Long Johns | OEM Functional Base Layer Manufacturer

Introducing our custom Men’s 100% Polyester Long Johns, expertly developed for brands seeking a reliable and comfortable thermal base layer. Made from 100% polyester in 180gsm jersey fabric, these long johns offer lightweight warmth, effective moisture management, and lasting durability—making them an essential layer for cool weather activities, outdoor work, or everyday wear.

Designed with a body-adaptive fit that allows full freedom of movement, these long johns feature a smooth jersey construction that sits comfortably against the skin without restricting motion. The lightweight fabric wicks moisture efficiently and dries quickly, helping to regulate body temperature throughout the day. Available in sizes XS to 3XL to fit a variety of body types.

Choose from classic color options including black, navy, grey, red, fuchsia, and orange, with custom Pantone color matching available to seamlessly integrate with your brand’s palette.

Enhance your product with our flexible branding options, including heat transfer logos, jacquard labels, and fully customizable tags.

We offer techpack based on your country, and can deliver prototype 2 times before your bulk order.

We are proud of our flat-lock, merrow and baselayer high quality stitching, and we provide round neck, v neck according to your needs. Furthermore, we bring your designs to life with custom graphic prints, such as chest prints, to fully realize your brand vision.

· Lightweight Warmth & Durable Construction

Crafted from 100% polyester in 180gsm jersey fabric, these long johns offer reliable thermal retention without excess weight. The smooth, lightweight construction provides effective insulation that locks in body heat while remaining low-bulk, making them a durable and practical choice for daily wear and outdoor use in cool conditions.

· All-Day Comfort & Easy Layering

Designed with a body-adaptive fit, these long johns allow natural movement and layering under everyday or athletic wear. The jersey fabric is soft against the skin, and thoughtful seam engineering minimizes irritation, ensuring comfort throughout the day without restricting motion.

· Effective Moisture Management

The 100% polyester fabric wicks moisture efficiently, helping to keep skin dry during activity or temperature changes. With quick-drying properties and breathable performance, this base layer helps maintain a comfortable microclimate next to the skin.

· Versatile All-Season Base Layer

Suitable as a standalone layer or under outerwear, these long johns adapt to a variety of settings—from outdoor work and casual wear to light recreational activities in cooler weather. Their understated design and functional performance make them a versatile addition to any cold-weather wardrobe.

Ideal for: Outdoor apparel brands, workwear suppliers, everyday basics labels, thermal wear manufacturers, and value-driven activewear companies.

Care Instructions: Machine washable. For best results, wash in cold water with similar colors. Avoid bleach and fabric softeners. Tumble dry low. Do not iron directly on printed or branded areas.