Swiftwick Performance Four (Quarter Crew) Socks Color:Black Ultra-stretchy ankle cuffs make for

Ultra-stretchy ankle cuffs make for easy on-and-off

4mm x 350mm

PULSE OX SENSOR: Track your blood oxygen saturation while you’re awake or asleep

Slotted holes for a custom position fit for you

LabeledSize: 700 x 42

Swiftwick Performance Four (Quarter Crew) Socks Color:Black Ultra-stretchy ankle cuffs make forTHE ORIGINAL SWIFTWICK: SIMPLE, RELIABLE PERFORMANCE SOCKS The original Swiftwick sock. Nylon in the heel and toe provide maximum durability. The ideal sock for mountain biking, gravel races and other adventures where durability is important. The Seven cuff height is a classic crew. Designed for maximum durability with reinforced heel and toe to keep your feet protected in abrasion prone areas. Lightweight, moisture wicking fibers keep feet dry, cool,