The J2 baselayer was developed for the US Deep Caving Team’s 2013 expedition to explore Cheve Cave System in Mexico. With excellent anti-microbial performance thanks to the use of silver ion technology, and outstanding wicking from a unique fabric, it is designed for extended use under a drysuit. Keeping the skin dry can be critical to success, whether it is staying warm, or preventing infections. The J2 base layer was designed to wick perspiration away from the skin and maintain a dry zone next to the skin. Air is a better insulator than water and consequently, the baselayer ensures better thermal protection. The J2 baselayer system takes this performance further with tried and tested anti-microbial silver ions embedded within the fibres of the fabric. This enables long, repetitive wear without the risk of skin infections developing – something which was critical on the J2 expedition. With colour-coordinated comfort zip, the top is not only easy to don, it has good aesthetics and is extremely comfortable thanks to excellent all-way stretch fabric and flat seams.