Heart Rate Monitor Grey Craft Sportswear The Plantar Fasciitis Socks are Size:8 The Plantar Fasciitis Socks are engineered with intentional compression zones mapped to support the arch and help reduce the sensations commonly associated with plantar fasciitis—especially during the first few steps of the day or long periods of standing unpretentious versatility is exactly what launched the 574 into the ranks of all time greats our advanced sensor will deliver reliable and accurate heart rate data for years the COROS Heart Rate Monitor delivers over 38 hours of continuous accurate heart rate monitoring to track your workouts in distraction free comfort