This plain blue rash vest from Tiki offers SPF50+ UV protection against the sun, also it can be worn on underneath a wetsuit to stop rubbing. The high collar prevents rubbing from the wetsuit in the neck area. Also featured is an elastic waist band which prevents the vest riding up the body. UV Protection SPF 50+ 100% Flat lock Stitching for comfort and durability Quick Dry, High Collar For Full Neck Protection Elasticated Waistband