The i3 is a performance mid-layer or expedition-weight thermal baselayer for use in cold conditions. The athletic fit and flat-knit face make it ideal for use beneath outer layers. Made from our four-way stretch fleece fabric, the i3 is wind-resistant, highly breathable, fast wicking and has a great warmth to weight ratio.

• Lightweight anti-pill polyester microfleece
• Wind resistant
• Fast-wicking finish moves moisture away from skin
• Rapid-dry finish

The West Advisor

The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.