The bag zips closed to protect your dry or wet suit and minimises the risk of damage to expensive zips and other fragile components on your drysuit or wetsuit. The zip allows partial and full opening to become a handy changing mat for quick and simple use when dressing in to or removing your watersport suit. Zip Closed (functional as bag): 85 cm x 63 cm. Zip Open (functional as mat): 85 cm x 126 cm.