A square containing two short diagonal, parallel lines in the upper-left corner indicates Dry in the Shade. When this modifier appears on a garment care label, the item must be air-dried away from direct sunlight to prevent ultraviolet (UV) radiation from fading colors, weakening delicate fibers, or degrading elastane.
Quick Answer
Air-dry the garment in a well-ventilated indoor space, under a covered porch, or in a fully shaded outdoor area. Never place items bearing this symbol in direct sunlight or under intense UV rays, which can cause photo-bleaching, yellowing of whites, and fiber brittleness.
What the Diagonal Lines in the Corner Mean
In the international textile care system, a basic square represents natural air drying. The addition of two diagonal slashes in the upper-left corner acts as a critical environmental modifier: keep out of direct sunlight.
Direct sunlight delivers both intense radiant heat and ultraviolet radiation. While sunlight can naturally sanitize and brighten durable white cottons, it causes significant damage to sensitive textiles:
- Photodegradation of Dyes: UV rays break chemical bonds in textile dyes (photo-bleaching), leading to uneven fading, streaking, and permanent color los.
- Polymer & Protein Breakdown: Natural protein fibers (such as silk and fine wool) and synthetic polymers (such as spandex and nylon) degrade when exposed to UV radiation, becoming weak, brittle, or yellowed.
- Elasticity Loss: Heat and UV light accelerate the dry rot of elastane cores in swimwear and athletic apparel, permanently destroying their stretch recovery.
How to Dry Items Marked for Shade
To dry garments properly without risking sun damage or prolonged dampness:
- Choose a Shaded, High-Airflow Location: Set up your drying rack or clothesline in a covered outdoor patio, a screened porch, a well-ventilated laundry room, or near an open window with indirect light. Ambient airflow is essential to replace the rapid evaporation normally provided by direct sun.
- Combine with the Primary Drying Direction: The shade modifier rarely appears completely alone; it is usually paired with a specific drying posture:
- Line Dry in the Shade (Curved top line + corner diagonals): Hang damp garments vertically from hangers or a clothesline in full shade.
- Dry Flat in the Shade (Horizontal center line + corner diagonals): Lay knits or heavy sweaters horizontally across a mesh rack out of the sun to prevent stretching and UV damage.
- Drip Dry in the Shade (Three vertical lines + corner diagonals): Hang dripping-wet synthetics over a drain or basin in a shaded area.
- Turn Garments Inside Out: As an added layer of protection against ambient UV exposure, flip dark and richly colored garments inside out before hanging or laying them flat.
Critical Mistakes to Avoid
- Do not dry on unshaded outdoor clotheslines: Even 30 to 60 minutes of direct midday sun can leave visible fade lines or bleach spots along the shoulders and folds of sensitive fabrics.
- Avoid window sills with direct sun exposure: Glass does not filter all UV radiation. Placing damp garments directly in sun-drenched windows can cause localized fading and fabric stiffening.
- Do not compromise on ventilation: Shaded areas have lower ambient temperatures than direct sunlight. Ensure adequate cross-ventilation or use a small circulating fan to prevent clothes from drying too slowly and developing musty mildew odors.
Symbol Combinations at a Glance
| Care Symbol Configuration | Instruction | Best Practice |
|---|---|---|
| Square + Corner Diagonals | Dry in Shade | General air drying indoors or under cover. |
| Square + Curved Top + Corner Diagonals | Line Dry in Shade | Hang on shaped hangers away from sun. |
| Square + Center Horizontal + Corner Diagonals | Flat Dry in Shade | Lay knits on a mesh rack away from sun. |
| Square + Three Vertical + Corner Diagonals | Drip Dry in Shade | Hang soaking wet over a tub in full shade. |
The two diagonal lines in the corner of a drying square serve as a simple shield against UV and heat damage. By drying these items indoors or in covered, well-ventilated shade, you preserve the vibrant colors, stretch, and fiber strength of your garments over their entire lifespan.