RANDY SUN Waterproof Knee-High Socks for Hiking & Wading, Medium — PU Membrane, Coolmax Wicking

RANDY SUN Military Waterproof Socks are knee-high, unisex performance socks with a lightweight PU waterproof membrane and moisture-wicking Coolmax lining designed to keep feet dry during hiking, fishing, cycling, and wading.

These medium-sized, knee-high socks combine a fully waterproof interlayer with breathable fabrics and performance fit details so you can stay comfortable in wet, cold, or windy outdoor conditions. Built with a smooth toe seam, deep heel cup and non-slip ribbed cuff, they are intended to wear inside boots for activities that demand prolonged protection from water without sacrificing breathability.

How do these socks keep my feet dry without overheating?

The socks use a lightweight 100% PU membrane as a waterproof barrier, paired with a Coolmax-rich lining to move perspiration away from skin. This combination blocks external moisture while enabling internal moisture vapor to escape, reducing clamminess during long activity.

• 100% PU waterproof breathable interlayer prevents external water ingress
• Coolmax lining wicks sweat away from the foot
• Breathable outer knit blends nylon, polyester, and elastane for ventilation
• Engineered for active use to balance protection and airflow

Will they stay in place and avoid blisters when worn with boots?

The socks are shaped for performance: a smooth toe seam reduces friction across toes, while the deep heel cup and full-wrap construction help lock the sock around the foot and lower calf. A non-slip ribbed cuff holds the sock up inside boots so it won’t bunch or slide during movement.

• Smooth toe seam minimizes toe irritation and abrasion
• Deep heel cup secures the sock in the boot
• Ultra-light cushioned sole adds comfort without bulk
• Ribbed cuff prevents downward slippage into footwear

Are these socks durable and easy to care for after outdoor use?

Constructed from high-tech synthetic yarns and a resilient PU membrane, these socks are made to withstand repeated wear in challenging conditions. Care instructions are simple: machine wash below 40°C or hand wash, tumble dry low, and avoid ironing or dry cleaning to preserve membrane performance.

• Outer knit resists wear: 61% nylon, 32% polyester, 7% elastane
• Durable Coolmax lining formula resists pilling and retains wicking
• Machine washable under recommended temperatures—no special detergents needed
• Note: cuff is not waterproof—avoid submerging water above the top of the sock

What activities are these socks best suited for?

These knee-high waterproof socks are designed for outdoor sports and tasks where wet conditions threaten foot comfort and warmth. They are particularly useful for fishing, wading, hunting, skiing, snowboarding, hiking, backpacking, mountain biking, and any situation requiring extended exposure to moisture.

• Fishing, wading, and water-edge work where splashes and shallow submersion occur
• Hunting and cold-weather sports like skiing or snowboarding
• Trail running, mountain biking, trekking, and multi-day backpacking
• General outdoor chores and travel in rainy or snowy conditions

Who is this for: The RANDY SUN Military Waterproof Knee-High Socks (medium) suit outdoor enthusiasts, field workers, and travelers who need reliable water resistance without sacrificing breathability. Choose these if you wear mid-to-tall boots, require a secure sock fit to prevent blisters, and want an easy-care, durable solution for wet-weather adventures. Keep in mind the top cuff is not intended to be submerged above the sock line.