os1st hosiery fs4 1/4 crew white

OS1st AC4 1/4 Crew Socks

Designed for all-day comfort and performance across any activity, the OS1st AC4 1/4 Crew Socks deliver targeted cushioning and advanced cooling exactly where your feet need it most. Plush padding in the heel and toe absorbs impact and helps reduce foot fatigue, while ultra-thin Skin Thin™ cooling panels across the top of the foot promote airflow and temperature control.

Constructed with bamboo charcoal ionized fibers, these socks offer exceptional softness, durability, and moisture management. The breathable design helps keep feet feeling cool, dry, and fresh whether you’re walking, training, working, or on the move all day. Engineered for a secure, comfortable fit, the AC4 socks provide performance support without added bulk.

For best results, please refer to the size chart before ordering to ensure optimal fit and comfort.

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Key Features

• Extra cushioning in the heel and toe for shock absorption and comfort

• Ultra-thin Skin Thin™ top panels to increase airflow and cooling

• Bamboo charcoal ionized fibers for durable softness and moisture control

• Lightweight construction for all-day wear

• Designed for performance, training, work, and everyday activities

• 1/4 crew height for versatile coverage and support

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Care Instructions

• Machine wash cold on gentle cycle

• Tumble dry low

• Do not use bleach or fabric softener

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Ideal For

• All-day wear

• Running and walking

• Training and fitness activities

• Work and travel

• Everyday comfort and performance