**Product Specifications:**
**Brand:** ALPINT MOUNTAIN
**Product Name:** RUNNER 4.0 Series
**Materials:** REPREVE® recycled polyester fiber
**Technology:**
- Smart temperature control technology
- Smart ventilation technology
- Moisture management technology
- Asymmetrical toe design
- Swiss technology silver ion treatment
**Features:**
- High-wear area reinforcement
- Targeted ventilation channels
- Arch compression protection
- Comfortable seamless toe
- Waterproof blister zone
**Usage Scenarios:**
- Long-distance races
- Urban commuting
- Trail running
- Running training
- Fitness activities
**Product Information:**
- Sizes: Men's 22-27CM, Women's 20-24CM
- Colors: Men's mid-calf socks in black and white, Women's mid-calf socks in pink, Men's ankle socks
**Product Display:**
- RUNNER 4.0 Mid-Calf Socks for Men in white and black, Women in pink
ALPINT MOUNTAIN and REPREVE collaborate to create sustainable and eco-friendly socks that incorporate REPREVE® recycled polyester fiber, offering moisture-wicking, temperature control, and ventilation features. The socks are designed for various activities such as long-distance running, trail running, and fitness training, providing comfort and performance for outdoor enthusiasts.
