Based off the highly popular Women's Tideline, this version features a slimmer fit around the calve and a lower boot shaft. Ideal for children, teenagers and ladies with narrow calves.TIDELINE 4.0 is both warm and waterproof, with exceptional grip, made for all day comfort - so no complaints about feet hurting on those long adventures! These calve height wellington boots is perfect for those who do not want to compromise on the quality. SUPERLITE technology has been designed to reduce weight and making these the lightest GRUBS boots. Just 1kg per pair and specially created to mould around your foot, they offer support in all weathers throughout the day._·      4MM INSU-FOAM ULTRA - gives all round foot comfort and insulation.  ·      5mm POLYOU footbed - provides a soft cushioning for an athletic shoe feel. A million microscopic nitrogen bubbles that insulate the wearer from cold surfaces.·      UNDERFOOT CHASSIS - give a sure-footed platform.·      SUPERLITE technology - makes this boot 30% lighter than conventional rubber boots, buoyant and extremely comfortable thanks to its' moulded shape. ·      SUPERDRI lining - is hard wearing, wicks moister away from the wearer's foot to prevent a sweaty and uncomfortable feel. It is fungus and rot proof so will not smell like cotton-lined boots.·      TRAIL-GRIP outsole - superior grip on a variety of surfaces, the tread is designed to work with the action of the foot·      DPA - (Distal Phalange Accommodation) or Big Toe Room). The big toe has lateral space allowing it to correct instability and give maximum propulsion.·      FOOTFORM - The boot is contoured under the foots transverse and longitudinal arch and the shell is shaped to the sole of the foot for maximum support.·      BIOFIT - To reduce the lateral torsion of the transverse arch, the shaped instep pad, which is built into the shell, is contoured over the top of the wearer's foot, to relieve pressure on the instep.·      DMA - (Differential Malleolar Accommodation) Supporting the ankle is extremely important but difficult because the bone shapes are complicated offset structures. With DMA, the tibia and fibula malleoli are anatomically positioned in the boot, providing a snug fit and soft support.·      COMFORT RATING -20ºc to +20ºc.