This is the Tilos 5/3mm Hooded Vest.

This Quality Vest features:

• 3mm body and 5mm hood
• Flat-Stitched throughout entire vest
• Multiple hood vents allows air trapped in suit to escape
• Neck band for maximum comfort and better seal between wetsuit and vest
• Easy to put on and take off

Add 3 additional millimeters of insulation to your wetsuit while eliminating the rush of cold water down your back.