This cover is a hypoallergenic, stretch fabric band made of 95% viscose/5%lycra to cover your PICC-line. The Picc line covers are machine washable and not waterproof. 
 
Medium size measures from 28 cm up to 32 cm circumference x 18 cm length
Large size measures from 32 cm up to 40 cm circumference  x 18 cm length