Neoprene Vest Information Neoprene vests are great to use on a hot summers day in the UK along with some board shorts. Otherwise, they can be used in mild climates like the Canary Islands and in hot climates for early mornings, or windy overcast days. They can also be used as an extra layer underneath a wetsuit in cold climates.  Men’s O’Neill Rash Vest Sizing Chart Size | Chest inch | Chest cm | XS | 33-35 | 83.8 - 88.9 | S | 35-37 | 88.9 - 94 | M | 37-39 | 94 - 99.1 | L | 39-41 | 99.1 - 104.2 | XL | 41-43 | 104.2 - 109.2 | 2XL | 43-45 | 109.2 - 114.3 | 3XL | 47 1/2- 50 1/2 | 120.6 - 128.3 |
 Women’s O’Neill Rash Vest Sizing Chart Size | Chest inch | Chest cm | US 4 / UK 6 | 30-32 | 76.2 - 81.3 | US 6 / UK 8 | 32-34 | 81.3 - 86.4 | US 8 / UK 10 | 34-36 | 86.4 - 91.4 | US 10 / UK 12 | 36-38 | 91.4 - 96.5 | US 12 / UK 14 | 38-40 | 96.5 - 101.6 | US 14 / UK 16 | 40-42 | 101.6 - 105.5 |
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