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Running Socks

A wet cotton sock generates 5–7 times more friction against skin than a dry technical sock, which is why most running blisters form in the first 20 minutes, before pace or terrain changes. Technical running socks use anatomical left/right shaping, targeted cushioning at the heel and ball of the foot and moisture-wicking fibres. Merino blends (typically 70% merino, 30% nylon) regulate temperature better in variable conditions; synthetic fibres wick faster and dry quicker. 

At Trailblazers, we stock socks across three cushion levels: light (1–3mm, maximum ground feel), medium (3–5mm, most versatile for Irish conditions) and heavy cushion (6mm+, suited to ultra distances). Knee-high compression socks improve venous return; studies show 3–5% reduction in perceived effort during runs over 90 minutes. Quality running socks last 500–800km before cushioning degrades significantly. 

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Frequently Asked Questions

Why are running socks better than regular socks?
Running socks address friction, moisture and anatomical fit. They use left/right shaping, targeted cushioning at the heel and ball of the foot and moisture-wicking fibres. A wet cotton sock generates 5–7x more friction against skin than a dry technical sock. Most running blisters form within the first 20 minutes when moisture builds rapidly in a non-wicking sock.
Can I run in normal socks?
Yes, for short distances on dry days. Over 5km or in wet conditions, cotton socks significantly increase blister risk. The main problem is not only moisture but fit. Standard socks bunch during dynamic movement, creating localised pressure points. For treadmill or short park runs, cotton socks are tolerable. For trail running, road racing or anything over 10km, a technical running sock is worth it.
How long do running socks last?
Quality running socks (Darn Tough, Feetures, 1000 Mile) typically last 500–800km before cushioning compresses significantly. Merino wool socks last longer than synthetic equivalents and resist odour better, but pill faster with heavy use. Washing inside-out in cold water without tumble drying extends lifespan.
Why do runners wear longer socks?
Graduated compression from the ankle upward improves venous return and reduces calf fatigue; studies show 3–5% reduction in perceived effort during runs over 90 minutes. Longer socks also protect against trail debris and UV. Some ultra-distance runners use compression socks specifically for recovery rather than during races.
What thickness running sock is best for trail?
Medium cushion (3–5mm stack height) is the standard recommendation for trail running. Light cushion (1–3mm) maximises ground feel and is preferred by experienced runners. Heavy cushion (6mm+) suits ultra-marathon distances where fatigue management outweighs feedback. For Irish conditions, merino blend socks (70% merino, 30% nylon) manage temperature better than pure synthetics.
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