Designed for excellent fast drying warmth and performance, the 5mm Infiniti glove is fully lined with Quick Dry Lining, and also features 100% UltraStretch neoprene with glued & blindstitched seams sealed with outer Taitex to keep warmth in. The tapered wrists and full "Gripper" palms ensure great traction, grip, and fit. Notes: Per the Xcel website, as a guide 5mm gloves should be suitable for water temperatures between 8 and 12 °C. The extra insulation in the 5mm verses the 3mm comes at the cost of dexterity.