Wind Coat with Detachable Inner Liner Inserted Through a Back Opening

The problem

Standard wind coats are built for a narrow temperature range. A heavily insulated coat becomes uncomfortable on mild days, forcing the wearer to carry a separate jacket or endure overheating. Conversely, a lightweight shell offers little protection when the wind picks up or the temperature falls unexpectedly. Layering multiple separate garments often results in bunching at the sleeves and collar, restricting movement and creating an uneven silhouette. Buyers looking for a single outerwear solution that transitions smoothly between seasons face limited options without purchasing two distinct coats.

The solution

This wind coat design separates the insulation from the shell entirely. The garment consists of an outer cover and a liner joined together at their edges. Between these two layers sits an independent inner bag. Instead of being sewn permanently into the coat, the inner bag is inserted through a dismounting mouth positioned at the back waist lining. Once inside, the bag is secured at key stress points to prevent it from twisting or bunching during wear. A connection sleeve located inside the outer cover cuff attaches flexibly to the liner cuff, keeping the sleeve layers aligned. At the front, the left front placket of the inner bag connects flexibly to the corresponding inner side of the outer cover’s left front placket. When warmth is no longer needed, the wearer simply reverses the process: disconnecting the cuffs and front placket, then pulling the inner bag out through the back opening. The coat then serves as a lighter, unlined garment.

Who it is for

• Outerwear brands seeking a versatile trench or wind coat that functions across multiple seasons without requiring customers to buy separate spring and winter versions.
• Uniform and workwear suppliers needing a single coat specification for employees who work in environments with fluctuating indoor and outdoor temperatures throughout the day.
• Private-label Amazon sellers looking for a practical outerwear listing with a clear functional feature—the removable liner—that differentiates the product from standard wind coats.
• Wholesale apparel distributors supplying retail chains where buyers demand garments that offer extended seasonal use to maximize shelf life and reduce inventory complexity.

How it works

The main parts

Operating steps

1. Insert the inner bag - Open the dismounting mouth (5) at the back waist lining and slide the inner bag (2) into the space between the outer cover (3) and the liner (4).
2. Connect the cuffs - Thread the liner cuff through the inner bag cuff and align it with the connection sleeve (6) inside the outer cover cuff, joining them flexibly.
3. Secure the front - Attach the left front placket of the inner bag to the inner side of the outer cover’s left front placket.
4. Close the back - Fasten the dismounting mouth to enclose the inner bag completely within the coat body (1).
5. Remove for warmer weather - Reverse the steps: open the back mouth, disconnect the front placket and cuffs, and pull the inner bag out to wear the coat as an unlined garment.

Applications

Transitional season commuting

Commuters traveling in early spring or late autumn face cool mornings and warmer afternoons. With the inner bag installed, the coat provides necessary warmth at the start of the day. By midday, the wearer removes the bag through the back opening and stores it, continuing the commute in a breathable, unlined wind coat.

Outdoor field work

Workers moving between climate-controlled buildings and outdoor sites need adaptable clothing. The detachable inner bag allows them to maintain warmth outside without overheating indoors, using a single garment rather than constantly changing jackets.

Travel and packing

Travelers visiting destinations with unpredictable weather benefit from a two-in-one garment. Packing one wind coat with a removable inner bag takes less luggage space than carrying both a heavy winter coat and a light spring jacket.

Retail uniform programs

Companies issuing uniforms to staff working in varied zones—such as loading docks and air-conditioned offices—can standardize on this single coat style. Employees adjust their own warmth level by inserting or removing the inner bag as their shift location changes.

Where it is less suitable

• Extreme winter conditions - The patent describes a silk floss wadding inner bag, which may not provide sufficient insulation for sub-zero environments compared to dedicated heavy parkas.
• High-intensity athletic use - The multi-layer construction and flexible connections at the cuffs and placket add slight bulk, making it less ideal for activities requiring maximum freedom of movement and minimal weight.
• Formal evening wear - While structured as a wind coat, the visible dismounting mouth and utilitarian connection points prioritize function over formal tailoring aesthetics.