Why do thermal underwear slip down when worn

The sliding of thermal underwear is usually related to size mismatch, insufficient fabric elasticity, or unreasonable shoulder strap design. The phenomenon of slipping when wearing is mainly affected by factors such as the fit between the underwear style and the body, fabric characteristics, and daily activity range.

1. Size mismatch

When the size of the thermal underwear is too large, the shoulder straps and waist circumference cannot tightly fit the body curve, which can easily cause displacement during movement. When making a purchase, chest and waist measurements should be taken as the basis, avoiding relying solely on height and weight. When trying on, you can test the fit by lifting your arms, bending over, and other movements. If there is a noticeable gap between your armpits and waist, you need to replace it with a smaller size.

2. Poor fabric elasticity

Warm underwear with high cotton content or without added spandex is prone to losing resilience, and after repeated washing, fiber relaxation intensifies and declines. Choose a blend material containing 5% -10% spandex, which can maintain a long-lasting wrapping sensation. It is recommended to use neutral laundry detergent during washing to avoid damaging the fiber structure due to high temperature drying.

3. Strap design defects

Strap designs that are too thin or straight lack anti slip function. It is recommended to choose widened threaded shoulder straps or cross vest designs. Some brands will add silicone anti slip strips on the inside of the shoulder straps to effectively reduce slipping. For those who exercise more, they can pay attention to whether the connection between the shoulder straps and the body of the garment uses reinforced stitching technology.

4. Waist elasticity failure

Aging of the hem elastic can cause the waist to lose its tightening force, manifested as frequent pulling of pants. When purchasing, you can observe whether the waist elastic band adopts a wide wavy design, which is more durable than thin straight elastic bands. After washing, it should be laid flat and dried to avoid the rubber bands being stretched for a long time.

5. Improper wearing method

When the thermal underwear is placed on the inner layer of a sweater, the friction of the outer layer of clothing will cause the underwear to shift. The correct way to wear it is to first wear a close fitting undershirt, then a thermal underwear, and finally a outerwear. During winter layering, anti slip vests can be used to secure the hem of underwear, or styles with anti slip adhesive dots can be chosen. Improving the sliding of thermal underwear requires starting from two aspects: selection and maintenance. Prioritize products with three-dimensional cutting and labeled with both height and weight dimensions, and avoid twisting them forcefully after washing. Folding instead of hanging during storage can reduce shoulder strap deformation, and regularly check the elasticity of waist elastic bands. If there is obvious looseness, the lower elastic band can be replaced with a wider elastic band, or anti slip strips can be added at the side seams. It is recommended to wear two items alternately in cold seasons to extend the lifespan of a single item.