The Tsangpo long sleeved thermal made using Italian Pontetorto Technostretch provides an excellent light weight yet warm technical insulation layer ideal for paddling. Constructed using flatlocked seams that wont chaff and no underarm seams the Tsangpo is designed to be form fitting and has a dropped rear hem to avoid gaps between layers while sitting. Pontetorto is a super soft natural feeling fabric with inner hydrophobic polyproylene 'fleece' to trap warm air while staying dry, and a smooth outer polyester material highly resistant to snagging or pulling. In addition the waffle like grid structures offer a broad range of functional advantages such as reduced weight, reduced pack size, and better ventilation for perspiration transport than a basic fleece. Use of Spandex in the material helps make it very stretchy and is it treated with Polygiene to reduce the build up of bacteria and nasty smells. Pontetorto has been Bluesign certified.