**Product Specifications:**

**Brand:** LangSha

**Material:** 100% pure cotton

**Features:**

- Optimal combed cotton from Xinjiang, with long fibers and good elasticity

- Ideal for postpartum physical weakness, health, comfort, cold prevention, and warmth

- Breathable, sweat-wicking, no smelly feet

- Durable, resistant to pilling and fading

- Environmentally friendly, strong wear resistance

- Reactive dyeing for color fastness

- Elastic sock mouth with lengthened thread and tight Lycra rubber band

- Exquisite hollow mesh fabric, non-slip, dry, and breathable

**Size:** One size fits shoe sizes 36-40

**Thickness:** Lightweight, moderate, warm, and elastic

**Certifications:** Tested and certified by national authorities for quality and safety

**Design:** Classic mid-calf socks in black, with elastic sock mouth and versatile vertical stripes

**Details:** Fashionable and versatile design, comfortable elastic, reinforced heel, smooth toe, and enhanced durability

**Testing Results:**

Fiber content: 100% cotton

Color fastness to water staining: Level 4-5

Color fastness to soaping: Level 4-5

Color fastness to rubbing: Level 4-5

Color fastness to perspiration: Level 4-5

Formaldehyde content: ≤75 mg/kg (undetected)

pH value: 6.4

Aromatic amine dyes: Not detected

Odor: None detected

These LangSha socks are designed to provide comfort, durability, and style, meeting high-quality standards for everyday wear.