Running marathons in humid Indian cities like Mumbai or Chennai.
The OS1st AC4's moisture-wicking bamboo blend and thin, breathable construction keep feet dry and cool, preventing blisters and discomfort during long-distance runs in high humidity.
You save 1,761 (34%)
34% off the seller list price
Doorstep delivery by 21 Oct - 23 Oct from USA






Run Further, Feel Better: Superior Comfort & Blister Protection
The OS1st AC4 Active Comfort Socks provide exceptional comfort and performance for runners and active individuals. Featuring 360-degree blister protection, contoured padding, and a reinforced seamless toe, these socks help revive sore feet. The thin construction maximizes airflow, keeping feet cool and dry with moisture-wicking fabric. Light compression aids circulation and provides support, while the anatomical design ensures a perfect fit for both left and right feet.
Crafted from a high-quality blend of 79% Nylon, 17% Polyester (derived from Bamboo), and 4% LYCRA® Spandex, these socks are durable and comfortable. The double tab design prevents slipping, ensuring they stay in place during intense activity. They are suitable for exercise and everyday wear, offering a blend of comfort, support, and light compression.
Experience the difference of imported athletic wear designed for peak performance. All customs duties and GST are included in the price. Your order will be shipped via ExpressBox with tracking, ensuring reliable delivery across India.
Engineered for Peak Running Performance
The OS1st AC4 socks are meticulously designed with runners in mind, integrating advanced features like 360-degree blister protection and contoured padding. The thin, breathable construction, utilizing a blend of Nylon, Bamboo Polyester, and Spandex, ensures your feet stay cool and dry even during strenuous activity in India's warm climate. Light compression aids circulation and muscle support, while the double tab prevents slippage, keeping you focused on your stride. Imported from authorized US retailers, these socks offer a superior alternative to standard athletic socks.
Ideal for Active Lifestyles, Consider Alternatives for Specific Needs
These socks are perfect for runners, cyclists, and anyone with an active lifestyle seeking comfort and blister prevention. They are also suitable for everyday wear when foot comfort is paramount. However, if you require heavy-duty orthopedic compression for medical conditions, consult a specialist for prescription-grade medical socks. For extremely cold weather running, consider thicker, insulated socks. Those with severe allergies to synthetic fibers should review the material composition carefully.
Typical situations where OS1st AC4 Active Comfort Socks Medium (1 Pair) | Blister Protection helps — illustrative scenarios, not customer reviews.
Running marathons in humid Indian cities like Mumbai or Chennai.
The OS1st AC4's moisture-wicking bamboo blend and thin, breathable construction keep feet dry and cool, preventing blisters and discomfort during long-distance runs in high humidity.
Daily commutes involving significant walking or standing, needing all-day foot comfort.
Contoured padding, light compression, and a seamless, non-binding fit provide sustained comfort and support, reducing foot fatigue throughout the day, even with extended periods on your feet.
| Care Instructions | Wash gentle on cold, tumble dry on low heat. No bleach or fabric softener. |
| Recommended Use | Running, cycling, athletic activities, everyday wear |
| Serving Size | 1 Pair |
| Cost per use | 1 pair at ₹3,476 — ₹3,476 per pair |
| Shelf life after opening | 12 months (standard for apparel) |
| Reapplication math | N/A (Durable item) |
| Contraindications | Severe allergies to synthetic fibers (Nylon, Spandex, Polyester) |
| Fit to Size Sentiment | True to Size |
| Feature | OS1st AC4 Active | Others |
|---|---|---|
| Blister Protection | 360° protection, contoured padding, seamless toe, double tab | Varies by brand; often relies on thicker material rather than targeted design |
| Material & Breathability | 79% Nylon, 17% Bamboo Polyester, 4% Spandex; thin, moisture-wicking, breathable | Often 100% cotton or basic polyester blends; less effective moisture management |
| Compression & Fit | Light compression for circulation, anatomical L/R fit, non-binding seamless | Basic elastic cuff, often generic sizing, may lack anatomical shaping |
| Cost per Pair (approx.) | ₹3,476 per pair | ₹150 - ₹400 per pair for comparable athletic socks |
| Durability & Performance | Reinforced toe, high-quality yarns for active use | Varies; lower-quality materials may wear out faster with intense use |
| SKU | cwh6080 |
| GTIN | 0810017616053 |
| Brand | OS1st |
| Model Name | Thin Air Running Socks |
| Part Number | 41OS1AC4AQUM |
| Color | Aqua |
| Pattern | Solid |
| Rise | No Show |
| Height Map | No Show |
| Fit Type | Regular |
| Toe Style | Reinforced Toe |
| Department | Unisex Adult / Mens |
| Target Gender | Unisex |
| Age Range | Adult |
| Material | 79% Nylon, 17% Polyester (Bamboo), 4% LYCRA® Spandex |
| Item Weight | 49 g (0.11 lb) |
| Item Package Weight | 0.05 kg (0.11 lb) |
| Item Package Dimensions | 11.3 cm x 15.4 cm x 3.6 cm (4.45 in x 6.06 in x 1.42 in) |
| Country of Origin | Imported — sourced from authorized US retailers and authorized brand partners |
About OS1st
OS1st specializes in performance athletic socks, focusing on comfort, support, and injury prevention for runners and active individuals.
Compliance & Legal
No product-specific compliance warnings identified. Standard imported-goods terms apply: customs duties & GST paid; for personal use in India; follow the manufacturer's usage instructions on the packaging.
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This item:
OS1st AC4 Active Comfort Socks Medium (1 Pair) | Blister Protection, Breathable, Light Compression
3,476

This item
OS1st AC4 Active Comfort Socks Medium (1 Pair) | Blister Protection, Breathable, Light Compression
3,476
Total price:
18,106
You save 7,871 (30%) Extra3 items selected
3 items
18,106You save 7,871 (30%) Extra
| Attributes | Current ![]() | ![]() | ![]() | ![]() | ![]() | ||
|---|---|---|---|---|---|---|---|
| Spec | |||||||
| Price | 3,476 5,237 | 11,126 15,723 | 3,504 5,017 | 3,226 3,689 | 5,698 6,868 | 1,562 3,928 | 2,656 3,241 |
| Rating | 4.50(395) | 4.50(395) | 3.90(422) | 4.60(5,751) | 4.40(4,007) | 4.40(57K+) | 3.20(3) |
| Brand Name | OS1st | OS1st | Niziruoup | Tommy Hilfiger | Morphsuits | Weiman | I Jewels |
| Source | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail | US Retail |
| Sold By | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow | CrowCrowCrow |
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