Wet Weather ProtectionWith it’s close athletic fit and fully waterproof, seam sealed construction the Pro SL Shell Jacket is a garment for those who will not let wet weather stop them from getting out and getting in the miles. That close fit means no excess fabric to catch the wind and waste your precious energy as you ride through the rain. For access to jersey pockets there is rear zipped port while an external gel pockets allows for quick and easy re-fuelling – just what you need on a foul winter’s day. ExoShell™ 40Using a unique 3 layer construction ExoShell™ fabrics achieve a colossal breathability rating of up to 60,000g/m²/24hr and an impressive waterproof rating of 18,000mm. The key to the ExoShell™ family’s impressive breathability lies in the ultrafine, fluorine free membrane which is up to 50% thinner than standard membranes, protected by a super-fine denier tricot laminate. The progressive construction of ExoShell40™ not only provides impressive breathability ratings but at a mere 70gsm it boast an incredible durability to weight ratio and results in minimal pack size. ExoShell40™ fabric is Bluesign approved and the DWR treatments are PFC-free providing strong environmental credentials. Engineered WaterproofingMeasured in mm of water that can be held by the fabric without leaking. 1,000mm is the minimum measurement needed to pass the accepted definition of “waterproof”. For a garment to be truly waterproof, the seams must be sealed (in addition to the fabric itself being waterproof). All Endura waterproof garments are 100% seam-sealed.